FFMPEG Doodstream compression method
The resulting video is very blurry and lossy. It's quite possible that when you provide a 60fps stream, it would blend 2 frames into one to create 30fps output. This would look like a very fluent video, especially at relatively low resolutions like 720p. With the amount of blur and lossy encoding, it's perfectly possible that this file is 'only' 1.3GB. Regardless, the compression is [email protected]/s with aac@128kbit/s.
Since you're new, perhaps a little word of advice: be very careful when posting copyrighted content, especially a full feature length film.