Ideally, my tool would run on the server. Especially if I wanted to monetize the service. (However I think there may be legal issues that are larger than the te

Ideally, my tool would run on the server. Especially if I wanted to monetize the service. (However I think there may be legal issues that are larger than the technical ones...) However it's just a small hobby project. So realistically I think this is how it will work: - If user tries to load a video without beat data yet, instructions are shown for how to add the beat data. The instructions will be running CLI command like `npx upload-beat-data [YOUTUBE-URL]` - The CLI tool will download the audio, then upload the beat data to my site. - The site will also log which videos got a lot of requests, but are missing beat data. So I can manually add the beat data myself.