My two favorites are the already mentioned Review of DETH and, this video by Ben (EDIT: I originally brain-farted and said "Gargos" here, golly.):
I love the sense of humor in the Review of DETH, and his observations about the game are all clear and accurate so it's a great representative video for MB2,
and I'm the Sev ARC in that clip at the end (named "burning") so I get ego-points every time I watch that Review.
Ben's vid has this sort of... manic dream-like quality that's fun and exhilarating and sort of morbid. To me.
Also the moment at 6:27 of wimpy imperial AT-ST pilots beating up a small child while gangster music plays is just priceless.
(I know it's a perfectly nice piece of hip-hop, and not "gangster music", but, in the context of the joke, it's gangster music.)