Longplays are the best but they're quite annoying @ games you know well, since it gets obvious that they're nothing more than blind playthroughs + save states for the most part. Like the longplayer would play badly for the most part but suddenly do something impossible to escape death in the middle of the longplay, or playing the whole game without being aware of key game mechanics, etc.
Still beats watching a person saying "lol this game is bad" every 2 1/2 minutes.