Not showing up in search engines

First of all, Thank you for such an amazing piece of software. It makes the dream of running your own YouTube a reality for the rest of us!
Every video from my instance that gets listed in google, gets this in a few days: « Incompatible browser. We are sorry but it seems that our software is not compatible with your web browser. » And then it gets removed from google, because it appears google bots can’t access it. Any ideas why this might be happening?

Can you provide the URL of such link?