http://www.archive.org/

Lots and lots of stuff, especially a favorite...."Moving Images".

Many gaming videos there:

http://www.archive.org/details/gamevideos

Reddit...I guess. Newgrounds. Nothing that either hasn't been mentioned or that you don't already know about.

I just deleted some bad posts, some off-topic posts and posts with links that were entirely inappropriate. This thread may have started to be a good idea, but it turned into cross-forum bashing, crusading and just nonsense.