I like to review facts, and usually substantial videos help establish the scene nicely so I can review them myself. Here are some that folks may be interested in, warning, much violence, blood, language etc.
33 min clip linked to just prior to dumpster fire being put out, which evidently set off Rosenbaum, he can be seen emerging from the street irate being held back by Huber, (you'll also see grey Camo Pants guy, the one that fires off the initial shot prior to Rosenbaum engaging Kyle and being shot):
LONG 5 hr 'clip', linked to just prior to Rosenbaum attacking Kyle and being shot:
The others can be seen in the AR15.com thread.
Additional info on someone digging up what they can on grey camo pants dude: