I don't know if there's a pre-existing site that will do it, but you could do this with FFmpeg and therefore FFmpeg.wasm. A brief search [1] indicates that it would likely be about the combination of the right filters. Ostensibly, you could put those filter options into the FFmpeg.wasm demo app [2] (scroll down) and get your video out.

[1] https://stackoverflow.com/questions/54547061/ffmpeg-animatio...

[2]https://ffmpegwasm.netlify.app