Whether the VideoPlayer has successfully prepared the content to be played. (Read Only)
A prepared VideoPlayer can start playing back the associated content instantly because preliminary parsing and buffering has been done.
A VideoPlayer starts out as not prepared (/false/) and becomes prepared (/true/) once VideoPlayer.Prepare has been invoked and the VideoPlayer.prepareCompleted event has been emitted. The property goes back to
false when VideoPlayer.Stop is invoked.
Preparation failures may lead to this property never being set to
true. In this case, an error description is sent through the VideoPlayer.errorReceived event.