This endpoint updates domain-level restrictions for a specific playback ID associated with a media asset. It allows you to restrict playback to specific domains or block known unauthorized domains.

How it works:

1. Make a PATCH request to this endpoint with your desired domain access configuration.
2. Set a default policy (allow or deny) and specify domain names in the allow or deny lists.
3. This is commonly used to restrict video playback to your website or approved client domains.

Example: A streaming service can allow playback only from example.com and deny all others by setting: "defaultPolicy": "deny" and "allow": ["example.com"].