lpd said:

I don't suppose you would consider using your methods on the two trailers for the Force Awakens? I've downloaded them from youtube but would love copies of them in better quality. You can download them in 1080p but they look quite soft.

YouTube HD is terrible. Highly compressed to save space and bandwidth. Only 1440P and higher is of acceptable quality.

You can see if the Star Wars website has a different copy, but I assume all will be 1080P. Plus, the film itself may have a very soft focus on it, or the trailer was supposed to be presented that way. With digital films, the quality is never that good.