Open source alternative to Runway

"Ran into Palmier on X and had to try it with Claude. I have to admit, my first impressions were pretty good. The one thing I found myself wishing for was a way to describe stuff better. Sometimes I know exactly what effect I'm looking at in a video, but I have no idea what it's called, which makes it hard to recreate. Maybe a library for visual effects with prompt examples woudl have made it easier :)"