Filter the length of podcasts

App version: x.y.z (state whether from Google Play/F-Droid/Custom built APK)

Problem you may be having, or feature you want:
I don’t like listening to podcast longer than, say 20 minutes, and for this reason I would find it helpful if you could add a filter for podcasts length.
Any chance to realize this?
Thanks
Joachim

Suggested solution:

Screenshots / Drawings / Technical details: