how to play a video in UIView swift?

If you want to use AVPlayerViewController:

let videoURL = URL(string: "https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4")
let player = AVPlayer(url: videoURL!)
let playerViewController = AVPlayerViewController()
playerViewController.player = player
self.present(playerViewController, animated: true) {
    playerViewController.player!.play()
}

For AVPlayer:

let videoURL = URL(string: "https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4")
let player = AVPlayer(url: videoURL!)
let playerLayer = AVPlayerLayer(player: player)
playerLayer.frame = self.view.bounds
self.view.layer.addSublayer(playerLayer)
player.play()

You can try to use AVPlayerLayer in a AVPlayer.

      let player = AVPlayer(url: video) // your video url
      let playerLayer = AVPlayerLayer(player: player)
      playerLayer.frame = videoView.bounds
      videoView.layer.addSublayer(playerLayer)
      player.play()

the only way to add a video to a UIView with fixed constraints in storyboard, was this :

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)

I hope other can use this! :)

This is how you can add and remove player in uiview.

var player: AVPlayer?
var playerController: AVPlayerViewController?
func removePlayer() {
    player?.pause()
    player = nil
    playerController?.player?.pause()
    playerController?.player = nil
    if let view = playerController?.view {
        videoView.willRemoveSubview(view)
    }
    playerController?.view.removeFromSuperview()
    playerController = nil
}

func setVideo(url: URL) {
    removePlayer()
    player = AVPlayer(url: url)
    playerController = AVPlayerViewController()
    playerController?.player = player
    self.videoView.addSubview((playerController?.view)!)
    playerController?.view.frame = CGRect(x: 0, y: 0, width: self.videoView.bounds.width, height: self.videoView.bounds.height)
   // player.play()
}