Search also for Filenames and/or to some tags/description to own movies

Hello,

we have here in school a lot of learnmovies, and yes the can’t be found the right title over some database. So i can’t find a way to search vor filenames too. For example: saved file as “english-lession_unit2.mkv”. Is there an setting, or an plugin that i can search for filenames too, or that the library add videos to the mysqlDB also with filename only?

Maybe some other solution: To add description/tags to such movies, but tested with the kodi-webinterface, and i found no way to do that.
Intallied Kodi 17 on Ubuntu 16.04 and Debian Stretch.

Thanks a lot