Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The HTTP Permissions-Policy header encrypted-media directive controls whether the current document is allowed to use the Encrypted Media Extensions API (EME).
Specifically, where a defined policy blocks use of this feature, the Promise returned by Navigator.requestMediaKeySystemAccess() will reject with a DOMException of type SecurityError.
Permissions-Policy: encrypted-media=<allowlist>;<allowlist>A list of origins for which permission is granted to use the feature. See Permissions-Policy > Syntax for more details.
The default allowlist for encrypted-media is self.