IOS Custom UIViewController Error - ios

Question

In my login screen of my Ios app I am trying to display a video. I saw on stack overflow a great example on how to do such thing. I tried the code out for myself and ran into an error. I was going to comment my error on the original post but my account did not have enough reputation to do so. My code when I run on my simulated device returns to me an error that says:
fatal error: unexpectedly found nil while unwrapping an Optional value
(lldb)
I managed to track down there error using breakpoints to line 12 which is avPlayer = AVPlayer(url: video!)
Though here is my full code:
import AVFoundation
import UIKit
class VideoBackgroundController: UIViewController {
var avPlayer: AVPlayer!
var avPlayerLayer: AVPlayerLayer!
var paused: Bool = false
override func viewDidLoad() {
let video = Bundle.main.url(forResource:"space", withExtension: "mp4")
//This is where my the error happens
avPlayer = AVPlayer(url: video!)
avPlayerLayer = AVPlayerLayer(player: avPlayer)
avPlayerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
avPlayer.volume = 0
avPlayer.actionAtItemEnd = .none
avPlayerLayer.frame = view.layer.bounds
view.backgroundColor = .clear
view.layer.insertSublayer(avPlayerLayer, at: 0)
NotificationCenter.default.addObserver(self,
selector: #selector(playerItemDidReachEnd(notification:)),
name: NSNotification.Name.AVPlayerItemDidPlayToEndTime,
object: avPlayer.currentItem)
}
func playerItemDidReachEnd(notification: Notification) {
let p: AVPlayerItem = notification.object as! AVPlayerItem
p.seek(to: kCMTimeZero)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
avPlayer.play()
paused = false
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
avPlayer.pause()
paused = true
}
}
And I do have a mp4 video named "space" in my project files.
Any explanation to how or why this is happening and what actions I can take to fix this issue would be greatly appreciated.

Answer 1

I have checked and your code is running fine.
Just check that, the video should be under in your "Copy bundle Resources" of "Build Phases" tab in Target .
If it is not there , Please add the same as in below screenshots.

Answer 2

You are assigning non optional value of video. Make it optional, ? Swift means – It can have a value, but it can also be nil. It is defined by “?”.Please look below code
avPlayer = AVPlayer(url: video?)
if avPlayer != nil
{ // Video url is not empty
}
else
{ // It is empty
}