Is there a place where I can get additional Video Player Skins for the AllVideos Plugin?

I wanted to get one that looked more like the video players seen on Adobe's website.

Sort of.

You'll need to use Flash.

What you'll need to do is visit jeroenwijering.com and download the Flash Media Player. Unzip that and you'll have the flash source for the player that AllVideos uses. You'll need to do your interface changes in Flash, and then publish the .swf with your changes. Name your modified player jw_allvideos_player.swf and replace the one that exists in mambots/content/plugin_jw_allvideos.