I don't understand youtube's ratings system. Two of my videos show a rating of 2.5 stars on the main page, but when I open the video page, they show 4 stars and 1 star respectively, each rated by two users. Is the front page showing me the average of all videos for each video? Not quite. A third video has a 1 star rating both on the main page as well as on the video page from one user, and a fourth has 3.5 on the main page and 4 on the video page from two users.
Aside from the fact that people think my videos are terrible, I don't understand anything else.