I’ve been knocked out by an amazing YouTube mash-up project by Kutiman. It’s called Thru You.
He’s trawled YouTube for completely unconnected clips and then cut and mixed them to make entirely new tracks.
I can’t conceive of the hours it must have taken just to find the clips, let alone all the editing and mixing. And the music he’s made really works on its own merits, not just as a novelty.
Once you’ve listened, click on the credits to list all the source material, then follow through to some of the clips to get a feel for what the job must have entailed.