Separate one video from the whole service
Try the YouTube homepage and another ordinary video. If only one item fails, look for its availability message and the creator’s official information. A region restriction on one upload is a different problem from a device that cannot reach YouTube at all.
Google’s help explains that an owner can restrict where a video is available and that YouTube may block content to comply with local rules. A network tool does not give you the creator’s permission or a playback guarantee.
Check account and network basics
Confirm the account and any age or managed-account restrictions. On a school or work network, ask the administrator about access rules. If the app fails but a supported browser works, update the app and follow official troubleshooting before replacing the connection setup.
Avoid installing an unknown extension or app merely because it promises to open a single video. Check the publisher and permissions.
A VPN is a separate decision
This site has not tested YouTube access through every listed provider. If you need a VPN for an allowed connection purpose, compare supported devices, price and the trust decision in our directory. Diagnose the playback error first so the purchase solves the problem you have.