fix: STRM files not playing correctly (#210)

Co-authored-by: PartyDonut <PartyDonut@users.noreply.github.com>

Author: PartyDonut

lib/models/playback/playback_model.dart

@@ -204,6 +204,8 @@ class PlaybackModelHelper {
       final trickPlay = (await api.getTrickPlay(item: fullItem.body, ref: ref))?.body;
       final chapters = fullItem.body?.overview.chapters ?? [];
 
+      final mediaPath = isValidVideoUrl(mediaSource?.path ?? "");
+
       if (mediaSource == null) return null;
 
       if ((mediaSource.supportsDirectStream ?? false) || (mediaSource.supportsDirectPlay ?? false)) {
@@ -230,7 +232,9 @@ class PlaybackModelHelper {
           chapters: chapters,
           playbackInfo: playbackInfo,
           trickPlay: trickPlay,
-          media: Media(url: '${ref.read(userProvider)?.server ?? ""}/Videos/${mediaSource.id}/stream?$params'),
+          media: Media(
+            url: mediaPath ?? '${ref.read(userProvider)?.server ?? ""}/Videos/${mediaSource.id}/stream?$params',
+          ),
           mediaStreams: mediaStreamsWithUrls,
         );
       } else if ((mediaSource.supportsTranscoding ?? false) && mediaSource.transcodingUrl != null) {
@@ -252,6 +256,11 @@ class PlaybackModelHelper {
     }
   }
 
+  String? isValidVideoUrl(String path) {
+    Uri? uri = Uri.tryParse(path);
+    return (uri != null && uri.hasScheme && uri.hasAuthority) ? path : null;
+  }
+
   Future<List<ItemBaseModel>> collectQueue(ItemBaseModel model) async {
     switch (model) {
       case EpisodeModel _: