Cleanup player setup example in API.md

Closes #4929

docs/API.md

@@ -209,17 +209,17 @@ You need to provide manifest URL as below:
   if (Hls.isSupported()) {
     var video = document.getElementById('video');
     var hls = new Hls();
-    // bind them together
-    hls.attachMedia(video);
     hls.on(Hls.Events.MEDIA_ATTACHED, function () {
       console.log('video and hls.js are now bound together !');
-      hls.loadSource('http://my.streamURL.com/playlist.m3u8');
-      hls.on(Hls.Events.MANIFEST_PARSED, function (event, data) {
-        console.log(
-          'manifest loaded, found ' + data.levels.length + ' quality level'
-        );
-      });
     });
+    hls.on(Hls.Events.MANIFEST_PARSED, function (event, data) {
+      console.log(
+        'manifest loaded, found ' + data.levels.length + ' quality level'
+      );
+    });
+    hls.loadSource('http://my.streamURL.com/playlist.m3u8');
+    // bind them together
+    hls.attachMedia(video);
   }
 </script>
 ```