thumbtime needs to be matched.
data-width -> data-file-width
data-mwtitle -> resource="File:.."
Fix px in width/height
alt does not exist for video (specified but not added to output, spec defines it should not be there accessibility for video is captions )
link does not exist for video( specified but not added to ouput)
thumb=File.jpg: Actually swaps the player out for an image. We should make that set the poster attribute to enable T121617: Use an image file as a poster for an audio thumb player (But does this require core to know what an image is ?)