http://v3ga.net/YouTubeMixer/
Let's see if we can mix memes with other things…
Best one I saw was this: https://www.youtube.com/watch?v=v4IC7qaNr7I&feature=PlayList&p=CC00FA9AE309ADB1&playnext=1&playnext_from=PL&index=37
Mixed with this: https://www.youtube.com/watch?v=4OKlzm6BQ8A&feature=PlayList&p=D759F477FBCBDC2D&index=0&playnext=1