videojs/video.js — pull request #1218 by shmulik (2014-05-18 05:38:11+00:00)
Title: Checking instanceof Arrays cross frames (needed for the vjs.Player.prototype.src method)

vjs.Player.prototype.src uses the instanceof Array method.
This will not work for arrays created on another frame,
Instead of instanceof we should use Array.isArray, but this is not supported on IE8.
So vjs.obj.isArray shim was created for the isArray method.