In Windows if you put ffmpeg.exe in the same folder it'll merge the best video and audio together so you can get any size for any video. Linux already has ffmpeg.

They don't distribute ffmpeg.exe with yt-dlp because of patents I guess.

Also get phantomjs.exe to bypass youtube download rate limit. It's kind of annoying to get these extra programs but you only have to do it once. Instructions are in the yt-dlp guide.