Ai video generator for random, moving patterns?

I want to make sort of a music video for a song, or rather, something to look at while listening on social media. I don't want anything realistic, just some colorful patterns that merge into one another

I've tried finding a service myself, but a lot of them are AIs that put together stock footage, or they're too sophisticated and cost too much.

I was hoping to find a free to use (or cheap) generator, maybe an old one, but haven't had any luck, which is why I came here (I hope this is the right subreddit to ask in)

Any recommendations welcome! Or even just recommendations on what to look for specifically, what terms to search etc.