История изменений
Исправление Grapow, (текущая версия) :
Тут ещё и труба потекла:
YouTube is experimenting with some sort of new aggressive IP-based block on videoplayback urls - perhaps to replace or complement the existing «sign in to confirm you are not a bot» error on the player endpoint. This produces an HTTP 403 error on videoplayback urls, regardless of client and protocol (HTTPS, DASH, HLS, UMP, SABR, ONESIE).
If you are seeing this for the first time, backing off further downloading/requests for a little while may help to lift it. It is recommended to make use of the yt-dlp sleep options to help avoid it. Otherwise, you might need to change IP. Update: this comment for more details.
https://github.com/yt-dlp/yt-dlp/issues/11868#issuecomment-2560431566
Исходная версия Grapow, :