I would assume that most of the Video-SL users use files with *.mp4 file extensions correct?

For the sake of simplicity I was trying out *.m4v just to separate my *.m4a stuff with a different naming scheme. Serato completely ignores the ID3 tags when you do this. When I changed the videos back to *.mp4 the tags were read properly again.

Strangely enough the files still played back without issue no matter what the extension is.