See Unlisted Videos Youtube Extension -

Instead of hunting for a magical extension, consider:

: If a user adds an unlisted video to a public playlist, that video becomes visible to anyone viewing the playlist. Legacy Content see unlisted videos youtube extension

Does it find random unlisted videos? Does it help you uncover unlisted videos already linked in your browsing session? Yes. Instead of hunting for a magical extension, consider:

: A large community-driven database that allows users to search through hundreds of thousands of unlisted videos that have been submitted or crawled from the web. see unlisted videos youtube extension