I used the edit /home/user/.config/tracker/tracker.cfg solution a while back.

It works well. You can still access the folders via the standard file manager and can start vids using that.

If you want to view images you can just move the folder (using file manager) containing the images into another folder and everything will be rescanned automatically and viewable via the image viewer as normal.

Move the image folder back into your "do not scan/watch folder" and all the images disappear immediatly from the image viewer.