Error:
ERROR: [youtube] 2X38k9dLvzM: Private video. Sign in if you've been granted access to this video. Use --cookies-from-browser or --cookies for the authentication. See  https://github.com/yt-dlp/yt-dlp/wiki/FAQ#how-do-i-pass-cookies-to-yt-dlp  for how to manually pass cookies. Also see  https://github.com/yt-dlp/yt-dlp/wiki/Extractors#exporting-youtube-cookies  for tips on effectively exporting YouTube cookies