Star Wars vs. Star Trek Mashups

There are numerous videos at YouTube that splice together scenes from various Star Wars movies with scenes from various Star Trek episodes and movies. These range in quality quite a bit, and there is overlap in the ideas people have come up with. Thought I've not seen more than a half-dozen of these shorts, the one I can recommend is this 5-minute one: Star Wars vs. Star Trek. This one is well done, and has a good sense of humor.