I frequently download videos from youtube onto Real Player on my laptop. Lately, when I have played videos on Real Player, the picture of the video on my laptop's monitor will freeze for 10 or 15 seconds, but the audio keeps playing normally. Then after 10 or 15 seconds of my picture being frozen, the video will catch up and show the missing 10 or 15 seconds of video really quick, like maybe 2 seconds. What is causing this? When I play videos on Real Player on my laptop, is it shortcomings of my laptop that is causing the video to lag behind the audio, or is the problem with my Real Player itself, not the hardware or other software of my laptop?