Separate message for media decode failure.

app/src/main/java/org/thoughtcrime/securesms/mediapreview/MediaPreviewFragment.java

@@ -96,6 +96,7 @@ public abstract class MediaPreviewFragment extends Fragment {
   public interface Events {
     boolean singleTapOnMedia();
     void onMediaNotAvailable();
+    void unableToPlayMedia();
     void onMediaReady();
     void onPlaying();
     void onStopped();

app/src/main/java/org/thoughtcrime/securesms/mediapreview/MediaPreviewV2Fragment.kt

@@ -436,6 +436,11 @@ class MediaPreviewV2Fragment : Fragment(R.layout.fragment_media_preview_v2), Med
     debouncer.clear()
   }
 
+  override fun unableToPlayMedia() {
+    Toast.makeText(requireContext(), R.string.MediaPreviewActivity_unable_to_play_media, Toast.LENGTH_LONG).show()
+    requireActivity().finish()
+  }
+
   private fun forward(mediaItem: MediaTable.MediaRecord) {
     val attachment = mediaItem.attachment
     val uri = attachment?.uri

app/src/main/java/org/thoughtcrime/securesms/mediapreview/VideoMediaPreviewFragment.java

@@ -84,7 +84,7 @@ public final class VideoMediaPreviewFragment extends MediaPreviewFragment {
 
       @Override
       public void onError() {
-        events.onMediaNotAvailable();
+        events.unableToPlayMedia();
       }
     });