What is Video: Definition and 722 Discussions

Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media. Video was first developed for mechanical television systems, which were quickly replaced by cathode ray tube (CRT) systems which were later replaced by flat panel displays of several types.
Video systems vary in display resolution, aspect ratio, refresh rate, color capabilities and other qualities. Analog and digital variants exist and can be carried on a variety of media, including radio broadcast, magnetic tape, optical discs, computer files, and network streaming.

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  1. berkeman

    Gyroscopic stabilization and the cameras used in MotoGP on-bike video feeds

    For many years, the on-bike cameras in Sportbike/Superbike/MotoGP racing showed the leaned images tied to the bike that the cameras were mounted on. Great stuff, but the new camera video from some of the MotoGP bike camera feeds for the last few years have included gyroscopic horizon...
  2. anorlunda

    Impressive Video Data Compression

    https://arxiv.org/pdf/2011.15126.pdf https://nvlabs.github.io/face-vid2vid/ https://wandb.ai/ayush-thakur/face-vid2vid/reports/Overview-of-One-Shot-Free-View-Neural-Talking-Head-Synthesis-for-Video-Conferencing--Vmlldzo1MzU4ODc One thing in this modern world seems to be ubiquitous; the demand...
  3. DennisN

    Video: SF ships/structures size comparison

    Here's a nice video which is a size comparion of a great number of fictional structures from science fiction novels, movies and games. The video is called "FICTIONAL STARSHIPS Size COMPARISON" but it includes some structures I personally wouldn't call starships, but anyway... Enjoy...
  4. R

    I Video lectures in Nuclear and Particle physics? (Undergraduate)

    Hi everyone, I was hoping the internet would be filled with video lectures since lots of universities have been forced to conduct online teaching. However, that doesn't seem to be the case. Therefore I was hoping that some of you know of some great video lectures for nuclear and particle...
  5. E

    This video demonstrates just how far vehicle safety has come

    This following video demonstrates just how far the automotive safety has come over the decades.
  6. robphy

    B Einstein's Universe (1979) - Nigel Calder, Peter Ustinov

    In contributing to the thread https://www.physicsforums.com/threads/i-need-recommendations-to-read-about-physics.996304/ , I see that the video that greatly influenced me to study relativity is now available online on YouTube (made available by the film distributor). In 7th-grade, after...
  7. kyphysics

    What's a Free & Safe Video Conferencing Tool?

    I've heard of Zoom, of course, as a video meeting tool. However, I've heard stories of it being hacked into by people and it being sometimes unsafe. I'm wondering if there is something like it that is both free and "safe" (I assume nothing is 100% safe, but am thinking of just not having any...
  8. B

    Electronic video clips that are not common knowledge, yet crucial

    How did you find PF?: Google Search 1) Have created YouTube video clips about electronics, cochlear implants, and Robert's Rules of Order => https://NDAcademy.FoxPing.com/. The electronics covers topics industry needs (zero theory). Starts at middle school grade level, ends at college level...
  9. Libor

    I Video camera in a moving rocket

    Lets imagine that I will put the recording camera and ticking clock into a box and so that camera can record this clock all the time ticking. I will put then this box to the speed of 1/2 speed of the light, after a minute of mine I would stop this box and take the camera from it. As it was at...
  10. Frigus

    What am I misinterpreting in this video? (Self motivation)

    In this video the presenter says that motivation comes after starting the process and achieving the goal but when I start the process and I achieve it I get relax and start doing things slowly, maybe i am not able to grasp something in this video. Will i have to gain external motivation on daily...
  11. Hamiltonian

    Studying Watching video lectures along with solving problems in a book?

    I recently started studying electrodynamics from Griffiths and found It rather challenging. I was able to finish the first chapter on basic math, Although my concepts on things like greens/stokes theorem were quite shaky as I am finding it rather difficult to follow the derivation of said...
  12. D

    Youtuber spamming hundreds of thousands of video uploads, wth?

    There is a youtuber named Roel Van de Paar who is using some program in order to spam video uploads and it is completely flooding the search by upload stream. Minute by minute this jerk keeps uploading tech vids with pseudo-content. I have actually never seen anything like that. I have...
  13. S

    I Does anyone really understand what's really going on with this video?

    If so, I want to have a nice thread where I can ask questions. :smile:
  14. S

    Video of motorized top - is the explanation correct?

    Is the presenter's explanation correct in all respects? And has anyone seen one of these "in person"?
  15. C

    Exploring Electrons: A Mind-Blowing Video Explanation

    I stumbled across this on youtube and wondered if someone could explain what we are actually looking at here. Looks amazing!
  16. murshid_islam

    B A question about a YouTube video on Thales's Theorem

    Here is the video in question: In the video at 4:23, Michael says, "Now Thales's Theorem tells us that the two other points, where these rays contact the circumference, are diametrically opposed. They are on opposite sides of the circle and a line passing through them will pass through the...
  17. Algr

    Terraforming the Pre-Earth? (Algol's video)

    I find this video absolutely amazing, and have watched it over a dozen times now. It helps if you can use the spacebar to pause it and read the text, and arrow keys to back up 5 seconds. - This is NOT phone friendly! Big monitor and 1440p recommended. So two different questions for...
  18. S

    Meaning of "brand" in video file formats?

    The program ffmpeg can be run on a video file to print out information about the file format. An example of some output: What is the meaning of the brand information?
  19. anothermike

    Does anyone remember the Eureka Physics cartoons, from the early '80s?

    I think this is an excellent educational resource for younger students, and I'm trying to find out more about high quality versions of these videos that may still be in use anywhere. https://animatedscience.co.uk/eureka-physics-videos-2 I have 2 pressing questions. 1) Where to locate these...
  20. Leo Liu

    Learning Maxima: Beginner Video Tutorials

    I am switching from Mathematica to Maxima. Although both of them are symbolic computation programs, I think it is better to start studying Maxima's language from the basic stuff. Could someone recommend some good video tutorials to me? Thanks.
  21. A

    Best aerodynamics video lectures

    Do you have some links of best aerodynamics video lectures?
  22. PainterGuy

    I Questions about this video on Taylor series

    Hi, I was watching a video on the origin of Taylor Series shown at the bottom. Question 1: The following screenshot was taken at 2:06. The following is said between 01:56 - 02:05: Halley gives these two sets of equations for finding nth roots which we can generalize coming up with one...
  23. S

    Is 720p the highest resolution possible for progressive scan video formats?

    For a DVD player, the amazon website https://www.amazon.com/gp/product/B07ZZMB571/?tag=pfamazon01-20 has the notes: Do the definitions of various video formats such as *.mp4, *.avi allow them to specify a "signal format", such as "720p" (https://en.wikipedia.org/wiki/720p) ?
  24. A

    Is the Coriolis Effect Real? Exploring Motion in a Tossed Ball Video

    Does ball (in video)when flying ,going in straight line or in curve line,so if I am inside this ball, will I feel like I am in car which accelarate in straight line or car which accelare in curve? I think ball is going straight,curved path is just illusion..
  25. S

    Human Body Systems Music Video

    I am a high school science teacher working on arts integration for thirty years in schools where many students have academic skills below grade level. I am looking for feedback.
  26. T

    COVID Excellent Video explaining how COVID-19 Spreads, Infects, is diagnosed

    Good for the general viewer who wants an overview, it then gets into the more detailed medical aspects for the medically knowledgeable or curious. Detailed explanations starting with the basics of how it spreads, through how it infects and affects the body, and diagnostic markers.
  27. harborsparrow

    Video conferencing with 20 people for 2 hours at no cost

    Looking for a best vid program that will let us have a group video call for more than an hour at no cost; expected max participation would be around 20. The ones I know about, off the top of my head, are Skype, Zoom and Google Hangouts. We are not a school or non-profit, just a bunch of...
  28. B

    Chess VS Video Games.... Which Is Easier To Quit?

    Personally I think it is chess. Which also makes it relatively safer to play. Video games are designed to suck up hours of time, while chess, if challenging enough, is such a mental workout that one game is enough. Both chess and video games can be addictive, but video games are often designed...
  29. L

    Need upgrade for computer to edit 4K video

    I have a camera that can shoot in 4K video, but trying to edit the footage is very laggy and my computer won't export the footage in 4K. I'd like to upgrade the computer I have instead of buying a whole new one. But I'm not sure what exactly I need to upgrade and what to upgrade it to. My...
  30. G

    I Vsauce's video on the Banach-Tarski paradox

    A question to Vsauce's famous video about the Banach-Tarski paradox at 10:09: Can you really construct the hyper-webster like that? If you choose the order like that, you'll never get any words containing other letters than "A". Shouldn't you choose an order like A, ... , Z, AA, ..., AZ...
  31. H

    Accurate Fluid Dynamics By Video Analysis

    Continue reading...
  32. S

    I Video lectures on lattices in mathematics

    Hi, I’m looking for video lectures on lattices in mathematics (or lattices in computer science) which might be related to number theory. Could anyone recommend some? Senmeis
  33. aiswariya

    Quantum Video lecture suggestion for Sakurai quantum mechanics Textbook

    hello! I've been trying to read through Sakurai's Modern quantum mechanics textbook ( My goal is to finish the first 3 chapters and understand the Dirac formulation of QM specifically) but I find myself stumbling at many places. Are there any video lectures on the internet that follows this text...
  34. S

    MHB DPS Calculator for Video Game

    I saw a post here about calculating damage per second (DPS) and tried to modify it to my need. https://mathhelpboards.com/pre-algebra-algebra-2/formula-calculating-dps-damage-per-second-18847.htmlis the original post. My attack power is 46722 and I make 2.15 attacks a second, that come to be a...
  35. jedishrfu

    Cool Origami Engineering Video

  36. S

    Momentum from static E and H fields? (So this video claims)

    Is it true, what he's saying from 04:28 to 04:56 ? I have my doubts, but I thought I'd better ask here.
  37. DrClaude

    Cool video on Color perception

    There are been many threads at PF on the perception of color. I would like to share a good video on the subject, which contains many interesting visual effects. This is from the Technology Connections channel, which has many videos of interest to our community. I encourage you to browse around.
  38. CynicusRex

    Can the big bang be compared to how video games start?

    If I understand correctly, when we interpret our data about the universe it seems the big bang came from nothing and threw out everything. Is it reasonable to compare this to a video game? Games also start from nothing and have suddenly loaded everything. If the game's AI was able to analyze...
  39. jedishrfu

    B Great New Video from 3Blue1Brown on the IMO 2011 Problem 2

    The Intl Math Olympics of 2011 had a problem that stumped many young participants except one who received a perfect score: Its called the Windmill problem: More here at AoPS: https://artofproblemsolving.com/wiki/index.php?title=2011_IMO_Problems/Problem_2
  40. DennisN

    News Atomic Veterans talk after 50 Years (video)

    This is one of the most powerful and incredible short movies I have ever seen. (I got the link to it from a friend today.) It contains clips of interviews of American soldiers who were exposed to real nuclear detonations. What they have to say is terrifying, intense and important. That's all I...
  41. cianfa72

    Voltaic Cell behaviour as described in this video

    Hi, googling for Voltaic cell I found this video about it. At minute 2:35 to 2:54 you can see that, without any electrical conductor connected between electrodes, in the Copper half-cell the metal electrode (Cathode) gets an amount of negative charges (electrons). Basically what described there...
  42. Asuratyr

    I Best video lectures on SSP following Kittel

    Hi, I am currently studying for our third year solid state physics course. We follow chapters 1-9 From Charles Kittel's "introduction to SSP" Youtube has a lot of videos on solid state physics yet i am struggling to find any video source for lectures that follow the book of Kittel. I would...
  43. R

    Video lectures or online course in thermodynamics

    Hello, I am beginning a course in thermodynamics in which we will be using the textbook "Fundamentals of Engineering Thermodynamics" (Moran, Shapiro Et al.). Does anyone know of a video series which covers similar topics as in textbook? I have the textbook, I am just looking for a supplement...
  44. W

    Buffering and delay in video compression

    1) What is the relationship between buffer at encoder and buffer at decoder? 2) How much preloading is necessary to ensure no buffer empties over the length of the simulation I.e. what is the minimum no. of bytes that must be in the buffer? 3)How to estimate delay due to buffering? 4) What is...
  45. S

    Wood/Glass/Metal I found an interesting video about Magnetic Balls -- Science is great

  46. jedishrfu

    SmarterEveryDay on Youtube Video Algorithm Hacking

    SmarterEveryDay is posting a series of videos (this is the first one) on Youtube Video Identification hacking, what it is and how it affects what we see online. Its really good even though the notion of manipulating the Youtube algorithm is very disturbing.
  47. P

    I Lawrence Krauss: Quantum Mechanics is deterministic (video)

    I understand partly what he is saying, but can you discount the measurement effect as a feature of the world? Aren't measurement effects going on all the time between macroscopic and microscopic systems, making it in practice, at times, an indeterministic world? Or is he assuming that...
  48. O

    Tips - physics video experiments

    Hello. In my bachelor thesis I make motivational video experiments in physics (for high schools). I want to mention some already existing videos. I know videos from our country or channels from YouTube. However if I'm looking for some videos from Universities or professional organizations...
  49. DaveC426913

    Looking for new laptop games for an old arcade gamer like me?

    I'm an old man. I cut my teeth on *pew pew* games in the video arcades of bowling alleys. I burned out my video game organ decades ago. The only carryover was games like Myst and SimCity and some of those Discover new lands type games. I like construction games rather than competitive or battle...
  50. S

    Details of color video vs monochrome

    I have a cctv camera that is defective that only gives violet image. I think the IR filter mechanism is broken and it is out of warrantee. I'd like to know how poorer can you resolve details using monochrome than using color. So I can decide whether to replace it (won't if the details are the...
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