This is for youtube videos that are part of a series, ie horrible time-sinks.
hbi2k does abridged anime series. He's done Berserk Abridged, Gantz Abridged, and is currently working on Escaflowne Abridged. For a bonus, he also does commentary once he's done with a series.
gazorra remixes Star Trek: TNG episodes and turns them into the most surreal bits of humor I've seen.
ItsJustSomeRandomGuy does the Marvel vs. DC videos. Nuff said.