Rifftrax video covers

[Ellipsis]

I'm one of those weird completionist persons who do all the side-quests in an RPG.

And thus I'm trying to get all the covers of the Rifftrax videos so I can attach them to my videos. I can download them from my Library, but it'd be nice to have them all in one place so I can download in one fell swoop without opening each video link. Any help?