Fullscreen mode fails due to Permissions Policy restriction

[darkstat0]

When trying to enable fullscreen in the video player, the browser throws the following errors:

• [Violation] Permissions policy violation: fullscreen is not allowed in this document
• TypeError: Disallowed by permissions policy

Steps to reproduce:

1. Open any episode
2. Click the fullscreen button or double click the video
3. Fullscreen does not activate

Expected behavior:
The video player should enter fullscreen mode normally.

Possible cause:
This looks related to fullscreen restrictions in the current document context, for example:

• missing fullscreen permission on iframe
• incorrect iframe sandbox / allow configuration
• conflicting or invalid Permissions-Policy / Feature-Policy headers
• fullscreen being requested on an element that is not allowed in the current context

Environment:

• Browser: Chrome
• OS: macOS

[darkstat0]

I’d be happy to help investigate or prepare a fix if this part of the frontend is public.