If you need to download a list of YouTube videos and don't want to download the
actual YouTube list (which yt-dlp supports), you can use the following method.
// Used to get list of raw URL's from YouTube's video tab'.
// Copy them into videos.txt.
document.querySelectorAll('#contents a.ytd-thumbnail.style-scope.ytd-thumbnail').forEach(el => console.log(el.href))
Download and install https://github.com/yt-dlp/yt-dlp.
# This will download all videos in videos.txt.
yt-dlp --batch-file videos.txt -N `nproc` -f webm