It is kind of funny that this guy seems to be an expert in Microsoft Windows and expects Mac OS 8.0 to be exactly the same.
He mentions that programs close without warning. That never happened to me. Maybe he is running and old system with not enough RAM?
He says that once you delete something on a mac, it is gone forever. Not true, just like in Microsoft, only the directory is removed. "If you know what you're doing you can go into DOS" and get the file back, on a Mac too. But just like on a PC, it is pretty much impossible to the average user. (Although the Apple's next operating system coming out in spring has the new integrated "Time Machine" that does this for you)
He talks about shutting down and losing files. With all the new Apple programs I believe this is circumvented by automatically saving a backup, as well as keeping a version somewhere invisble on backup for if you didn't get to save it, and it unexpectadly quits. This usually happens because of programming errors, but the program prompts you if you want to revert back to the unsaved version. (Also, with Time Machine, you don't even have to save)
He talks about shutting down the computer. I've had to do that once or twice, and you just press the button for three seconds. On the old iMacs, if you really had a problem (like he obviously had), you push a button in the back near the wires, and before that you would have poked something inside a little hole to turn it off.
The video is simply outdated.