Chrome Cast Fails co cast movies

[vicvarma]

I have been watching old movies from India on youtube. Find that some of the older movies (pre-1980) cannot be cast. Got a message on the screen that "This movies cannot be cast remotely. Choose another." Can someone explain why some of the movies can or cannot be remotely cast? Thanks.

 

[Minkey1]

I've had that. I'm guessing it's some restriction placed by the uploader. Why they're happy for the video to be watched on a computer screen but not a TV screen, I don't know.