TableView with labels, images, gifs and video hangs/stuck incorrect while fetch from firestore in iOS, Swift

I have tableview with label, imageView (for image, gif & video thumbnail). I am sure that doing wrong and I can't handle its completion handler due to which the app is hanged and stucked for long time.

My model is like,

struct PostiisCollection {
    var id :String?
    var userID: String?
    var leadDetails : NSDictionary?
    var company: NSDictionary?
    var content: String?
    
    init(Doc: DocumentSnapshot) {
        self.id = Doc.documentID
        self.userID = Doc.get("userID") as? String ?? ""
        self.leadDetails = Doc.get("postiiDetails") as? NSDictionary
        self.company = Doc.get("company") as? NSDictionary
        self.content = Doc.get("content") as? String ?? ""
        
    }
}

I wrote in my view controller for fetch this,

var postiisCollectionDetails = [PostiisCollection]()
 override func viewDidLoad() {
        super.viewDidLoad()
       let docRef = Firestore.firestore().collection("PostiisCollection").whereField("accessType", isEqualTo: "all_access")
               docRef.getDocuments { (querysnapshot, error) in
                if let doc = querysnapshot?.documents, !doc.isEmpty {
                    print("Document is present.")
                    for document in querysnapshot!.documents {
                        _ = document.documentID
                        if let compCode = document.get("company") as? NSDictionary {
                        do {
                        let jsonData = try JSONSerialization.data(withJSONObject: compCode)
                        let companyPost: Company = try! JSONDecoder().decode(Company.self, from: jsonData)
                        if companyPost.companyCode == AuthService.instance.companyId ?? ""{
                            print(AuthService.instance.companyId ?? "")
                            if (document.get("postiiDetails") as? NSDictionary) != nil {
                                let commentItem = PostiisCollection(Doc: document)
                                self.postiisCollectionDetails.append(commentItem)
                              
                            }
                            }} catch {
                              
                            }
                            DispatchQueue.main.async {
                                 
                                self.tableView.isHidden = false
                                self.tableView.reloadData()
                            }
                        }
                  
                    }}}
    
        
    }

I need to check for the index path with image view is either image or gif or video with different parameters, I tried with tableview delegate and datasource method by,

extension AllAccessPostiiVC: UITableViewDataSource, UITableViewDelegate {
    
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
   
        return postiisCollectionDetails.count
    }
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "AllAccessCell", for: indexPath)
    let label1 = cell.viewWithTag(1) as? UILabel
    let imagePointer = cell.viewWithTag(3) as? UIImageView   
     let getGif = arrPostiisCollectionFilter[indexPath.row].leadDetails?.value(forKey: "gif") as? NSArray
           let getPhoto = arrPostiisCollectionFilter[indexPath.row].leadDetails?.value(forKey: "photo") as? NSArray
           let getVideo = arrPostiisCollectionFilter[indexPath.row].leadDetails?.value(forKey: "video") as? NSArray
        
           label1?.text = "\(arrPostiisCollectionFilter[indexPath.row].leadDetails?.value(forKey: "title") ?? ""
            if getGif != nil {
               let arrGif = getGif?.value(forKey: "gifUrl") as! [String]
               print(arrGif[0])
               
               let gifURL : String = "\(arrGif[0])"
               let imageURL = UIImage.gifImageWithURL(gifURL)
              imagePointer?.image = imageURL
               playButton?.isHidden = true
           }
           if getPhoto != nil  {
               let arrPhoto = getPhoto?.value(forKey: "photoUrl")  as! [String]
                print(arrPhoto[0])
               let storageRef = Storage.storage().reference(forURL: arrPhoto[0])
               storageRef.downloadURL(completion: { (url, error) in
                   do {
                       let data = try Data(contentsOf: url!)
                       let image = UIImage(data: data as Data)
                       DispatchQueue.main.async {
                           imagePointer?.image = image
                           playButton?.isHidden = true
                       }
                   } catch {
                       print(error)
                   }
               })
           }
           if getVideo != nil {
                 let arrVideo = getVideo?.value(forKey: "videoUrl")  as! [String]
             
               let videoURL = URL(string: arrVideo[0])
               let asset = AVAsset(url:videoURL!)
                     if let videoThumbnail = asset.videoThumbnail{
                        SVProgressHUD.dismiss()
                       imagePointer?.image = videoThumbnail
                       playButton?.isHidden = false
                     }
             }  

}

If I run, the app hangs in this page and data load time is getting more, some cases the preview image is wrongly displayed and not able to handle its completion

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