Export bind on videojs. Fixes #2322

src/js/video.js

@@ -5,6 +5,7 @@ import globalOptions from './global-options.js';
 import Player from './player';
 import plugin from './plugins.js';
 import mergeOptions from '../../src/js/utils/merge-options.js';
+import * as Fn from './utils/fn.js';
 
 import assign from 'object.assign';
 import log from './utils/log.js';
@@ -243,6 +244,16 @@ videojs.extends = extendsFn;
  */
 videojs.mergeOptions = mergeOptions;
 
+/**
+ * Bind (a.k.a proxy or Context). A simple method for changing the context of a function
+   It also stores a unique id on the function so it can be easily removed from events
+ * @param  {*}   context The object to bind as scope
+ * @param  {Function} fn      The function to be bound to a scope
+ * @param  {Number=}   uid     An optional unique ID for the function to be set
+ * @return {Function}
+ */
+videojs.bind = Fn.bind;
+
 /**
  * Create a Video.js player plugin
  *