Fetch video from server through API using AVPlayer in Swift 3 - swift3

Question

I am trying to fetch video from server in AVPlayer.The data is in JSON format. I have given down data of JSON format too. The video is in .mp4 format.
But the video doesn't play. But before I tried to play the video from local storage of .mp4, it played successfully in AVPlayer. What is problem with my code? I am using Swift 3.
My code is :
//ViewController
import UIKit
import AVFoundation
import AVKit
import Alamofire
class ViewController: UIViewController {
var playerController = AVPlayerViewController()
var player:AVPlayer?
var playerController1 = AVPlayerViewController()
var player1:AVPlayer?
var dictDataImage:NSArray = NSArray()
var dictDataVideo: NSArray = NSArray()
var appDictionary:NSDictionary!
#IBOutlet var videoPreviewLayer2: YTPlayerView!
override func viewDidLoad() {
super.viewDidLoad()
self.videos()
videoPreviewLayer2.delegate = self
}
func videos(){
let collectionviewone: String = "http://rillmark.academy/api/rillmark-academy/home-page-video"
Alamofire.request(collectionviewone, method: .get, parameters: nil, encoding: JSONEncoding.default)
.responseJSON { response in
debugPrint(response.result)
if let JSON = response.result.value{
self.appDictionary = (JSON as AnyObject) as! NSDictionary
print("self.app =",self.appDictionary)
let url1: URL = URL(string: (self.appDictionary.value(forKey: "home_video")) as! String)!
let url4 = url1.absoluteString
print("url11=", url1)
print("url22=", url4)
let url3 = NSURL(fileURLWithPath: url4)
let item = AVPlayerItem(url: url3 as URL)
print("item=", item)
self.player = AVPlayer(playerItem: item)
self.playerController = AVPlayerViewController()
self.playerController.player = self.player
self.playerController.view.frame = self.videoPreviewLayer.frame
self.videoPreviewLayer.addSubview(self.playerController.view)
self.playerController.showsPlaybackControls = false
self.playerController.player?.play()
}
}
}
}
//JSON
{
"status": "Success",
"home_video": "http://video/homepage/e27U0B_1502445369-homepage-2.mp4",
}