docs: clarify text tracks are meant for any usage of Video.js, both video and audio (#4790)

thijstriemstra · gkatsev · commit 1672a6df35cf · 2017-12-04T17:44:09.000-05:00
diff --git a/docs/guides/text-tracks.md b/docs/guides/text-tracks.md
@@ -1,6 +1,6 @@
 # Text Tracks
 
-Text tracks are a feature of HTML5 video for displaying time-triggered text to the viewer. Video.js offers a cross-browser implementation of text tracks.
+Text tracks are a feature of HTML5 for displaying time-triggered text to the end-user. Video.js offers a cross-browser implementation of text tracks.
 
 ## Table of Contents
 
