Here's a summary of the comments people have made, if you don't want to look through 300+ comments:
(1) JOAN JETT ROCKS. (2) THIS IS THE BEST SONG EVER. (3) I LOVE ROCK N ROLL! (4) BRITNEY SPEARS SUCKS. (5) The song that plays in the beginning of the video is "Bad Reputation." (6) This is a cover song. The original was by The Arrows. (7) Comments about Joan Jett's looks, sexual orientation, gender, etc.