You should get into photography, you'll understand how diffuse/single source lighting makes things look. Also remember how big these things are, way beyond anything you've ever seen.
Dude I can see the clouds moving on my little phone screen. Clouds move like 2 miles an hour and this is a 3ish hour time lapse from a million miles out so obvs it's going to be slight
Then you're just not very observant or you choose not to see it. Don't look for lateral movement it's too slow for that. Look for things changing shape/dissipating.
Pick a small cloud in the lower left that's fairly isolated and follow it for the entire time lapse. Also you should probably go outside and watch what clouds moving looks like.
