[Video] Add dimension info to share intent pt.2 (#5640)

modules/Share-with-Bluesky/ShareViewController.swift

···
     } catch {}
     return nil
   }
-  
+
   private func saveVideoWithInfo(_ dataUrl: URL) -> String? {
     let ext = String(dataUrl.lastPathComponent.split(separator: ".").last ?? "mp4")
-    guard let tempUrl = getTempUrl(ext: ext),
-          let track = AVURLAsset(url: dataUrl).tracks(withMediaType: AVMediaType.video).first else {
+    guard let tempUrl = getTempUrl(ext: ext) else {
       return nil
     }
-    let size = track.naturalSize.applying(track.preferredTransform)
-    
+
     let data = try? Data(contentsOf: dataUrl)
     try? data?.write(to: tempUrl)
-    
-    return "\(tempUrl.absoluteString)|\(size.width)||\(size.height)"
+
+    guard let track = AVURLAsset(url: dataUrl).tracks(withMediaType: AVMediaType.video).first else {
+      _ = try? FileManager().removeItem(at: tempUrl)
+      return nil
+    }
+
+    let size = track.naturalSize.applying(track.preferredTransform)
+    return "\(tempUrl.absoluteString)|\(size.width)|\(size.height)"
   }
 
   private func completeRequest() {