Since YouTube's API does not allow users to simply request a list of another channel's unlisted videos, browser extensions and third-party sites use a few clever workarounds to track them down: Show YouTube Dislikes and Unlisted Videos
Despite the technical limitations, several extensions exist in the Chrome Web Store and Firefox Add-ons marketplace. They function in the following ways: show unlisted videos youtube extension
The catch? If you lose the link to your own unlisted video, finding it again can be surprisingly difficult—especially if you have hundreds or thousands of uploads. Since YouTube's API does not allow users to
Discuss the 2021 YouTube "Security Update" that changed older unlisted videos to private unless opted out. 3. Technical Methodology for an Extension show unlisted videos youtube extension
: Creating a repository of user-contributed URLs.