"I once realised when watching a DVD on my Playstation 3 that you can set the speed to 1.5x. Which means you can finish watching a 2 hour movie in only 1hour 30 mins and still understand what’s going on. “That gives me 30 minutes of life back!” I said excitedly."
Or you can read the Wikipedia summary in 90 seconds and get 1 hour 58.5 minutes back but that's not really the point.
How about just don't watch the movie? There's no obligation to watch any of them and there are so many that there's always going to be something you miss however much you try and cram in.
Watching a movie is something which is meant to be a pleasure, or thought provoking, or profound or any number of things which are going to be largely lost at high speed. At that point you're just reducing it to consumption so you've seen it and maybe it's just me but what's the point of that?