Factory for a custom ad player: create media elements inside the supplied container
and return a PlayerAdapter. When video is provided, use that existing content
video element so ads remain visible in picture-in-picture or native fullscreen.
If the factory ignores it, the SDK falls back to the content player.
Factory for a custom ad player: create media elements inside the supplied container and return a PlayerAdapter. When
videois provided, use that existing content video element so ads remain visible in picture-in-picture or native fullscreen. If the factory ignores it, the SDK falls back to the content player.