Video with a .ogg extension seems to be identified as video/x-theora+ogg, while .ogv is simply video/ogg. Totem doesn't seem to register a thumbnailer for video/ogg.
Video with a .ogg extension seems to be identified as video/x-theora+ogg, while .ogv is simply video/ogg. Totem doesn't seem to register a thumbnailer for video/ogg.