Unable to watch age restricted videos.

I have only downloaded youtube-dl.exe which I use together with mpv sometimes to watch youtube videos. The thing is that when I try to watch an age restricted video, I get this response:

C:\Users\user>mpv https://www.youtube.com/watch?v=9roObG3yq-8
[ytdl_hook] ERROR: Sign in to confirm your age
[ytdl_hook] This video may be inappropriate for some users.
[ytdl_hook] youtube-dl failed: unexpected error occurred
Failed to recognize file format.

Exiting... (Errors when loading file)

I’ve seen some people suggest cookies… But would there be a point in adding cookies if the age restriction system needs an irl identity just to let you watch the vid?

[ronkwann]

extract a cookie from your chrome or firefox as mentioned below; https://github.com/blackjack4494/yt-dlc/issues/7#issuecomment-716038621

and use the --cookies argument, works for me

[Rainyan]

I’ve moved on to use the (in my opinion) more active youtube-dl fork, yt-dlp.

With yt-dlp installed, this works for me (force-seekable allows you to skip around the video):

REM Pipe to stdout ("-o -"), and then read from it with mpv ("mpv -")
yt-dlp -o - https://www.youtube.com/watch?v=foo |mpv --force-seekable=yes -