Version 3.0, basically, as the guy has made this two times before and each time has added more villains he forgot when reminded by commenters.
It comes in at just under 16 minutes (15:58, actually). It's not trying to break new ground or win any awards. It's just a bunch of screenshots of basically every villain from the start right up through the end of GT (not counting Oolong, Yamcha, or Pu'ar). The pics themselves are of varying quality; some appear to be DVD rips, some are taken from websites with URLs still showing, and one or two appear to be scans, possibly from Daizenshuu.
Nevertheless, the "parade o' villains" is great fun, he uses some of the original Japanese songs, and it's interesting to watch how things evolve; not just the drawing style, but the very concepts of the villains themselves.
I think it's worth a watch, if you have a bit of free time.
http://akatoshblog.blogspot.com/2007/07/blog-post.html
Villains of Dragonball
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Villains of Dragonball
Trunks & Goten forever