Simple, someone posts a YouTube of a video game song, and then the next poster rates it on a scale from 1/10, while then posting a video themselves. Multiple songs are allowed, but no ones required to listen to all of them.
[video=youtube;-Kh9FDOoSeM]http://www.youtube.com/watch?v=-Kh9FDOoSeM#t=23s[/video]
Skip to 23 seconds.
[video=youtube;-Kh9FDOoSeM]http://www.youtube.com/watch?v=-Kh9FDOoSeM#t=23s[/video]
Skip to 23 seconds.