Animated GIF

The get-up animation may have been omitted due to concerns over file size, perhaps? Since GIFs use lossless compression the file sizes can get quite large pretty easily, even if optimised. So if you have a lot of frames to show, or large frames, or want more than 256 colours, or sound, an embedded youtube link may work better (since as far as I know, the video data is hosted by youtube and not the wiki). Most of the time I'd prefer a video link on skill pages, since I'd only look up how the skill looks once (and in that case I'd want to hear its sound effects, too). The rest of the time I'm there for the text-based info and can just ignore that the video exists...

Regarding speed, GIFs can be laggy or play at different speeds depending on one's browser.

I also agree with Angevon about the 'fighting yourself' thing, since it's easier to see what bit of each character is where if they're wearing something significantly different in colour.

I do like GIFs as icons for flashy dyes and items, though. So a guide on how to make them could be nice for wiki users to have access to. ^^

I think you're right about everything you said. It might be size issues for the reason they look a bit..."fast" as well as cutting some of them short. And yes, not hearing the sound as well is a bit sad. If I didn't already know what they looked/sounded like I can bet I'd still look up a video for them.