Check out example codes for "how can i play video with url in a view in swift". It will help you in understanding the concepts better.
Code Example 1
let url = URL(string:myURL)
player = AVPlayer(url: url!)
avpController.player = player
avpController.view.frame.size.height = videoView.frame.size.height
avpController.view.frame.size.width = videoView.frame.size.width
self.videoView.addSubview(avpController.view)
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