On top of the nostalgia-riddled look at past incarnations of Warcraft, the retrospective provides insight into the origins of things such as the RTS genre itself and perhaps one of the first map editors that ended up in user hands, setting the stage for just about every RTS to start providing one baseline. Entertaining and educational! Uh, sort of. I really do recommend watching it, though. It's only a click away, so go on! Hit play!
[ Thanks, Ray, James and Colyn! ]