I don't know if the video was doctored, but his release is pretty damn quick on all his film. His release, mechanics, and footwork are a thing of beauty. His arm strength is probably B+ to A-, somewhere in that range and more than good enough. He's a pretty good athlete too. Not blazing fast, probably more like a 4.7-4.8 guy- similar to Baker Mayfield in that he can run a little bit but it's not a huge part of his game.
Patterson is really talented. No doubt about it. He's got to put it all together. Has yet to do that in his brief career at Ole Miss. He's only played in 10 games and made 9 starts coming off his true sophomore year. I think a lot of people forget that. He's not a proven or finished product by any means. He's still a young, inexperienced QB who still has to prove himself. He's got a hell of a lot of talent though. For sure the most talent that any Michigan QB has had under Harbaugh.