improve quality-select

youtube/static/js/plyr-start.js

@@ -118,11 +118,4 @@
     },
     settings: ['captions', 'quality', 'speed', 'loop'],
   });
-
-  // Hide the external quality selector
-  window.addEventListener('DOMContentLoaded', function(){
-    const qs = document.getElementById('quality-select');
-    if (qs)
-      qs.hidden = true;
-  });
 }());

youtube/static/js/watch.js

@@ -31,11 +31,12 @@ if (data.using_pair_sources) {
 }
 
 // Quality selector
-document.getElementById('quality-select').addEventListener(
-    'change', function(e) {
-        changeQuality(JSON.parse(this.value))
-    }
-);
+const qs = document.getElementById('quality-select');
+if (qs) {
+  qs.addEventListener('change', function(e) {
+    changeQuality(JSON.parse(this.value))
+  });
+}
 
 // Set up video start time from &t parameter
 if (data.time_start != 0 && video) {video.currentTime = data.time_start};