The creator on that channel simply uses a DAIN application without pre or post processing the images (either the base images or the optical flow maps).

I take a different approach and I can't say I haven't found issues (I have, many, I'm working on them).

My goal is to reach a level where there are almost none artifacts (there are a couple in that video at the start, when the shield is released and when there are many large movements of the camera due to Curiosity dangling off the parachute). As I said, I'm still working on it, and in between my other side projects, work and quarantine I've been on a less-than-ideal situation.

In time, if I pull it off, I'll post it and I guess you'll see it.