>>530388516
>I don't think there's all that many fmv's in the game, it's usually all in-game cutscenes so you can see how retarded you've dressed up your character
It seems you're right. The game's "Movies" folder contains only the Rockstar logo video and 7 copies of the opening cutscene (for different languages).
So if I use the patch then I can switch to 16:10 after the cutscene and probably have no stretching issues after that point.