See Unlisted Videos Youtube Extension -

: An open-source extension designed to list unlisted videos that it detects while you browse.

For many users, finding these "hidden" gems requires more than just a standard search. This guide explores how to find unlisted videos using browser extensions and other specialized tools. Finding Unlisted Videos with Extensions see unlisted videos youtube extension

Here is a little-known fact: The video itself remains unlisted, but its thumbnail and title show up inside the playlist. : An open-source extension designed to list unlisted