UITableView And Diffable Data Source

import UIKit

@available(iOS 13.0, *)
typealias UserDataSource = UITableViewDiffableDataSource<TblSection, YoutubeVideoModel>
@available(iOS 13.0, *)
typealias UserSnapshot = NSDiffableDataSourceSnapshot<TblSection, YoutubeVideoModel>

enum TblSection{
    case first
}

class SearchViewController: UIViewController {

    @IBOutlet weak var lblRecord: UILabel!
    @IBOutlet weak var searchTblView: UITableView!
    
    var arrVideo = [YoutubeVideoModel]()
    
    @available(iOS 13.0, *)
    lazy var datasource = UserDataSource()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        lblRecord.text = "Let's start searching videos"
        if #available(iOS 13.0, *) {
            configureDatasource()
        } else {
            // Fallback on earlier versions
        }
        searchTblView.register(VideoTableViewCell.self, forCellReuseIdentifier: "VideoTableViewCell")
        setupSearchController()
        APICalling()
    }
    
    @available(iOS 13.0, *)
    func getDatasource() -> UserDataSource{
        var datasource: UserDataSource!
        return datasource
    }
    
    @available(iOS 13.0, *)
    func configureDatasource(){
        datasource = UITableViewDiffableDataSource<TblSection, YoutubeVideoModel>(tableView: searchTblView, cellProvider: { (tableView, indexPath, modelVideo) -> VideoTableViewCell? in
            self.configurationCell(indexPath: indexPath)
        })
    }
    
    @available(iOS 13.0, *)
    func createSnapshot(users: [YoutubeVideoModel]){
        var snapshot = UserSnapshot()
        snapshot.appendSections([.first])
        snapshot.appendItems(users)
        datasource.apply(snapshot, animatingDifferences: true)
    }
    
    func configurationCell(indexPath: IndexPath) -> VideoTableViewCell{
        let cellVideo = VideoTableViewCell.cellVideo
        var cell = searchTblView.dequeueReusableCell(withIdentifier: cellVideo.identifier, for: indexPath) as? VideoTableViewCell
        if cell != nil{
            if let arr = Bundle.main.loadNibNamed("VideoTableViewCell", owner: self, options: [:]){
                cell = arr[cellVideo.index] as? VideoTableViewCell
            }
        }
        let modelVideo = arrVideo[indexPath.row]
        cell?.modelVideo = modelVideo
        cell?.tapYoutube = {
            modelVideo.videoId.playInYoutube()
        }
        cell?.tapWatchLater = {
            DatabaseHelper.shareInstance.saveYoutubeVideo(modelYoutube: modelVideo)
        }
        return cell!
    }
    
  }



extension SearchViewController: UITableViewDataSource{
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        arrVideo.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        configurationCell(indexPath: indexPath)
    }  
}