Currently Kometa only allows the Duration search filter on movie libraries, however it is available in the Plex UI as a filter option for Episodes as well so presumably could be allowed in Kometa (maybe that is an incorrect assumption, I don't know).

The purpose I have at the moment for this is in order to have a Runtime overlay that removes the "0h" before the "??m" from anything below 60 minutes (I have it functioning for movies, however it isn't as useful there). However I am sure it would have other functions as well!

Thank you for your consideration!