More styles clean up

src/sass/types/audio.scss

@@ -54,3 +54,8 @@
         }
     }
 }
+
+// Progress
+.plyr--audio .plyr__progress__buffer {
+    color: $plyr-audio-progress-buffered-bg;
+}

src/sass/types/video.scss

@@ -152,6 +152,7 @@ $embed-padding: ((100 / 16) * 9);
     }
 }
 
-.plyr--video .plyr__time {
-    text-shadow: 0 1px 1px rgba(#000, 0.15);
+// Progress
+.plyr--video .plyr__progress__buffer {
+    color: $plyr-video-progress-buffered-bg;
 }