An AVPlayerItem cannot be associated with more than one instance of AVPlayer?

Had same issue, try setting ContentURL after Setting the SourceType like below.

It might be a problem with MovieSourceType; you are playing a local file but using MPMovieSourceTypeStreaming; just modify the type and try again.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.