So now YouTube does this thing where it will automatically clean out deleted videos from your favorites and other playlists, and that in and of itself is a double-edged sword: on the one hand, it certainly saves us the trouble of having to go through and do it ourselves (which is sometime I did on occasion with my favorites), but on the other hand, with it automatically removing deleted videos from these playlists, you can't tell which videos were deleted unless you somehow manage to memorize the exact order your favorites and others are in.