This is an update to my original post here a while back.
In my opinion the best MAME/Arcade Emulation intro videos are done by Dave Dries.
"Arcade '84" and the shorter "MAME Arcade" are awesome.
I recently found out that the highest resolution possible for these videos is 640x480:
http://www.cinemarcade.com/home.htmlIn Dave's words (see link above):
"I've uploaded the full-resoltion version of Arcade '84 to my Youtube channel. Arcade '84 was originally rendered at 640x480, 25fps and the video shared online since then was half-sized. Back then sharing video online was still new and that was actually a decent sized file. Now more than a decade later I've finally gone back to the original file and uploaded it in the original resolution. The files and software used to create Arcade '84 are now obsolete so this is the best it'll ever get. And I have to admit by today's standards it's pretty rough. The render looks very dated and the increased resolution only serves to point out the many flaws. Some flaws due to the render quality of the software, some due to my inexperience with using it. But it is what it is. I enjoyed creating it back then and I've enjoyed sharing it for more than a decade now."
I was able to get a hold of the "full resolution" 640x480 version of Arcade '84. Let me know if anyone would like it for their cabinet intro. [EDIT: the best quality version I have of this video is actually 480x360. The 640x480 version was more compressed than the slightly smaller version, so what I really have is a 480x360 version. Still better than the original available at cinearcade.com]
I'd still like to get my hands on "MAME arcade" in 640 x 480. I'll keep looking.
