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?
Thanks

Can you provide the URL of such link?