YouTube videos invisible on Firefox

Hi everyone,

I'm facing a very specific issue with YouTube ?

When I visit certain YouTube channels, their video feed appears completely empty (as if they haven't posted in over a year).

If I use a VPN, all videos reappear. If I use another browser (Chrome) on the exact same network without a VPN, all videos appear fine. The channels affected are normal channels (including local/French ones with no geoblocking).

With the help of Gemini I already tried to :

Disable my custom DNS Disable all my extensions Incognito mode Create a fresh firefox profile Clear all cookies, site data, and cache for Youtube Disabled DoH (DNS over HTTPS) in Firefox settings

Please help ^{^}