[youtube] Extracting URL: https://www.youtube.com/watch?v=YLslsZuEaNE
[youtube] YLslsZuEaNE: Downloading webpage
WARNING: [youtube] Unable to download webpage: HTTP Error 429: Too Many Requests (caused by <HTTPError 429: Too Many Requests>)
[youtube] YLslsZuEaNE: Downloading initial data API JSON
WARNING: [youtube] No supported JavaScript runtime could be found. YouTube extraction without a JS runtime has been deprecated, and some formats may be missing. See  https://github.com/yt-dlp/yt-dlp/wiki/EJS  for details on installing one. To silence this warning, you can use  --extractor-args "youtube:player_client=default"
[youtube] YLslsZuEaNE: Downloading android sdkless player API JSON
[youtube] YLslsZuEaNE: Downloading iframe API JS
[youtube] YLslsZuEaNE: Downloading player 89e685a2-main
[youtube] YLslsZuEaNE: Downloading web safari player API JSON
[youtube] YLslsZuEaNE: Downloading web player API JSON
WARNING: [youtube] No title found in player responses; falling back to title from initial data. Other metadata may also be missing
ERROR: [youtube] YLslsZuEaNE: Sign in to confirm you’re not a bot. 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