Nest a 5 second image over a video before its saved

[timswift]

The image called openingScreen i want it combined with the video recorded if that is possible. So openingScreen goes in front of the video for 5 seconds its combined with the recording video and then it is saved to the photo gallery. This is going on in func imagePickerController with the video url.

import UIKit
import AVKit
import MobileCoreServices

class ViewController: UIViewController , UIImagePickerControllerDelegate , UINavigationControllerDelegate {

    @IBOutlet weak var RecordButton: UIButton!
    var videoAndImageReview = UIImagePickerController()
    var videoURL: URL?
    var openingScreen = "title"

    @IBAction func RecordAction(_ sender: UIButton) {
        
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera) {
            print("Camera Available")
            
            let imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.sourceType = .camera
            imagePicker.mediaTypes = [kUTTypeMovie as String]
            imagePicker.allowsEditing = true
            
            self.present(imagePicker, animated: true, completion: nil)
        } else {
            print("Camera UnAvaialable")
        }
        
    }
    
    func imagePickerController(_ picker: UIImagePickerController,
                               didFinishPickingMediaWithInfo info: [String : Any]) {
        dismiss(animated: true, completion: nil)
        
        guard
            let mediaType = info[UIImagePickerControllerMediaType] as? String,
            mediaType == (kUTTypeMovie as String),
            let url = info[UIImagePickerControllerMediaURL] as? URL,
            UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(url.path)
            else {
                return
        }
        
        // Handle a movie capture
        UISaveVideoAtPathToSavedPhotosAlbum(
            url.path,
            self,
            #selector(video(_:didFinishSavingWithError:contextInfo:)),
            nil)
    }
    
    @objc func video(_ videoPath: String, didFinishSavingWithError error: Error?, contextInfo info: AnyObject) {
        let title = (error == nil) ? "Success" : "Error"
        let message = (error == nil) ? "Video was saved" : "Video failed to save"
        
        let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.cancel, handler: nil))
        present(alert, animated: true, completion: nil)
    }
  
    @IBAction func openImgVideoPicker() {
        videoAndImageReview.sourceType = .savedPhotosAlbum
        videoAndImageReview.delegate = self
        videoAndImageReview.mediaTypes = ["public.movie"]
        present(videoAndImageReview, animated: true, completion: nil)
    }
    
    func videoAndImageReview(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        videoURL = info[UIImagePickerControllerMediaURL] as? URL
        print("videoURL:\(String(describing: videoURL))")
        self.dismiss(animated: true, completion: nil)
    }

}