Basically,  these are anim files that are highly compressed using JPEG
methods.   There  are  several versions of Amiga-compatible players available.
On my 1200 I use  mp103.

	Have  a  look  in  Aminet:gfx/show  for  other  players  and  also  in
Aminet:gfx/conv if you want to mess around and make your own Mpegs.