How to update video path in library db?

I'm making a script that moves videos (movies) from one folder to another, after it has ended playing.
But now I dont have a clue on how to update its path, so it stays in library.

I dont want to clean/scan because it would lose (i think) watched status and other details changed by user.

Btw, I'm using xbmc.Player.getPlayingFile() to know witch movie is, dont know if there are better solutions...


Thank you and I'm sorry if my English is not ok.