@ThatGuyInLa, which Apple TV are you seeing this on? Forth or fifth (aka, 4K) generation? Moreover, are you running a beta OS? I ask because I'm using an Apple TV 4K running the latest non-beta OS and haven't seen it. But, I'll keep looking for it!
I think it's underwater as I've seen it too. Once I caught the beginning of it, and it kinda looks like something such as a wave or ice is breaking up and stirring dirt underwater which is the 'rolling clouds' you speak of. It's a short video so if you blink you might miss it. Or catch the end!