Delete Recording After Watching

Is there any way to set a DVR recording to delete after watching after a certain amount of time? I liked this feature on Plex as a double check to keep the library size reasonable.

On a related note, can someone explain what exactly the “keep last X watched” setting does? Does that keep unlimited unwatched episodes PLUS X amount of watched ones?

Keep last X watched will keep all unwatched and the last X watched.

Manual recordings won’t auto delete, but anything recorded from a pass will adhere to the keep setting.

Do you mean keep all unwatched?

Yep, damn autocorrect keyboard.

I edited my response.