Back in 2001, a guy called David Dries created www.cinemarcade.com and some fantastic MAME fan videos.
Skip forward nearly 20 years and I have upscaled three of the videos to 1440p, 60fps smooth motion.
The videos were converted with https://www.convert-it.org
You can find the original cinemarcade.com website here:
http://mirrors.arcadecontrols.com/www.cinemarcade.com/
The videos can be used as system logos or startup videos.