Improve resolution switching

Extensions/AVKeyValueStatus+String.swift

@@ -0,0 +1,21 @@
+import AVFoundation
+import Foundation
+
+extension AVKeyValueStatus {
+    var string: String {
+        switch self {
+        case .unknown:
+            return "unknown"
+        case .loading:
+            return "loading"
+        case .loaded:
+            return "loaded"
+        case .failed:
+            return "failed"
+        case .cancelled:
+            return "cancelled"
+        @unknown default:
+            return "unknown default"
+        }
+    }
+}