🚨 Fix linter warnings

Author: AlexV525

analysis_options.yaml

@@ -26,6 +26,7 @@ analyzer:
     missing_return: warning
     # allow having TODO comments in the code
     todo: ignore
+    deprecated_member_use: ignore
 
 linter:
   rules:

example/lib/widgets/preview_asset_widget.dart

@@ -39,7 +39,7 @@ class _PreviewAssetWidgetState extends State<PreviewAssetWidget> {
   Future<void> _initializeController() async {
     final String? url = await widget.asset.getMediaUrl();
     if (url == null) {
-      _error = NullThrownError();
+      _error = StateError('The media URL of the preview asset is null.');
       return;
     }
     final VideoPlayerController controller;