Funny that you found that post, its mine 😉 I was never able to preserve the quality. Here’s what I did. Made a fresh new comp. (720 X 480), what I needed for FCP and then Pre-Comped the Comp. (1650 X 1080). Rescaled the pre-comp to fit into my 720 X 480 and exported it. The quality of the 720X480 video was not even close to as clear as the original.
I should mention I am not working with video, I’m working with screenshots I took with my computer, then edited with Photoshop, and what I am animating is Photoshop Layers…