[slmkbh]

Well, there always is (slightly nsfwish url) http://twoyoutubevideosandamotherfuckingcrossfader.com/

[n4r9]

Haha. It looks like a lot of fun, but does it allow for making playlists, collaboratively or otherwise?

[slmkbh]

As far as I know, no.

It pretty much does what it says in the URL :)