For Github click the [<> Code] tab and Releases are listed on the right, but you probably want to scroll down that tab to the readme for installation instructions. Clarifies which file to download and other dependencies.
I linked to the list of sites that yt-dlp supports but i believe you need yt-dlp, deno, ffmpeg, ffprobe in the same folder at bare minimum. Something like the Hitomi GUI versions are easier to grab and go if you are only looking for youtube rips.
