Not music videos, but I nominate two of my subscriptions on YouTube,
EpicMealTime - awesomeness, every single video is pure awesomeness, and it has bacon.
DTFdowntofilm - sketch comedy, funniest are the S*** Baseball Players Say duology, if you get baseball jokes.
This is one of my favourite EMT vids, there are swears but they are censored. http://www.youtube.com/watch?v=H5RHyna1jfU