Runtime Column in Series Table View (Using Media Info Instead)

Currently the Runtime pulls from TVDB or some other source. Would it be possible to instead pull the runtime info from the file instead, if the episode has been downloaded? Or potentially a separate column for that. I can manually go into the ep and hover over the Media Info to see actual run time.

My reasoning is. I have a few shows that have extended versions of the episodes. I would like to be able to, at a glance, see which episodes I’m missing the extended version of. For a 30 min ep it’s 45 instead.