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Have anybody played around with www.thetvdb.com scrapers for tv series sorting in MT scripts?
On "github" there are some.
Description of the episode can be put as file descripiton in the MT database. In case e.g. you don't use ffmpegthumbnailer but reading png form same directory it sounds a feasible solution for the images to display.
I'd have to look at it, thanks for the hint.