Look for YTPlayerView-iframe-player.html in main directory as well

Classes/YTPlayerView.m

@@ -719,6 +719,13 @@ - (BOOL)loadWithPlayerParams:(NSDictionary *)additionalPlayerParams {
                                                      ofType:@"html"
                                                 inDirectory:@"Assets"];
   }
+
+  // React-Native's bundler can only put resources files in the main bundle directory
+  if (!path) {
+      path = [[NSBundle bundleForClass:[YTPlayerView class]] pathForResource:@"YTPlayerView-iframe-player"
+                                                                      ofType:@"html"
+                                                                 inDirectory:nil];
+  }
 
   NSString *embedHTMLTemplate =
       [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:&error];