About the MediaPlayerItem class
After a MediaResource is successfully loaded, Browser TVSDK creates an instance of the MediaPlayerItem class to provide access to that resource.
The MediaResource represents a request that is issued by the application layer to the MediaPlayer instance to load content.
The MediaPlayer resolves the media resource, loads the associated manifest file, and parses the manifest. This is the asynchronous part of the resource loading process. The MediaPlayerItem instance is produced after the resource has been resolved, and this instance is a resolved version of a MediaResource . Browser TVSDK provides access to the newly created MediaPlayerItem instance through MediaPlayer.CurrentItem .
You must wait for the resource to be successfully loaded before accessing the media player item.