AVContentAuthorizationUnknown

The last completed call to request content authorization completed.

The last call to request content authorization was cancelled by the user.

The last call to request content authorization was cancelled because the timeout interval was reached.

The last call to request content authorization couldn't be completed because another asset is currently attempting authorization.

The last call to request content authorization couldn't be completed because there was no known mechanism by which to attempt authorization.

The last call to request content authorization couldn't be completed in a non-recoverable way.