The most straightforward way to download age-restricted videos is to let yt-dlp "borrow" the login session from your web browser. Reddit·r/youtubedl
Standard video downloaders often fail on age-restricted content because YouTube has disabled many of the old "embed-based" bypasses. Without a way to verify age, the server simply refuses to send the video data, resulting in "Sign in to confirm your age" errors. Method 1: Using the --cookies-from-browser Flag (Easiest) yt-dlp download age restricted videos
How to Download Age-Restricted YouTube Videos with yt-dlp Downloading age-restricted videos from YouTube can be difficult because the platform's servers typically require an authenticated session to prove the viewer is 18 or older. is widely considered the best tool for this task because it can use your existing browser session or an exported cookie file to "prove" your age to YouTube. Why Standard Methods Fail yt-dlp download age restricted videos