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Authenticated access

When you are getting an error, where Youtube asks you to sign in to confirm your age or that you are not a bot, or just a "server error 403", passing cookies from the browser may help.

Cookies from Browser

Simplest way to pass cookies is to use option Analysis yt-dlp Cookies from browser (it is shortcut for yt-dlp option --cookies-from-browser).

Select your browser there and ensure you are logged in on Youtube in the browser.

When having multiple profiles in the browser, will be chosen the most recently used one. Or you can specify profile explicitly by selecting Custom in this option and entering it in form <browser>:<profile>, for example, "Firefox:my_home_profile".

Elaborating further, you can create dedicated profile just for this purpose, maybe even with a different throwaway account. Example for Firefox can be found in this comment.

Help Authenticated access