Add brightcove support

Brightcove videos now have a URL that can be pasted into a module like this to output the iframe.

Sample Brightcove video code:

<div style="display: block; position: relative; max-width: 500px;"><div style="padding-top: 56.25%;"><iframe frameborder="0" src="//players.brightcove.net/1094142158001/f150a402-ecea-40c6-9ae4-a4c854694835_default/index.html?videoId=5507747481001" 
allowfullscreen 
webkitallowfullscreen 
mozallowfullscreen 
style="width: 100%; height: 100%; position: absolute; top: 0px; bottom: 0px; right: 0px; left: 0px;"></iframe></div></div>

The "//players.brightcove.net/1094142158001/f150a402-ecea-40c6-9ae4-a4c854694835_default/index.html?videoId=5507747481001" bit can be taken from this and used in this module.

This means you don't necessarily need an API connection to Brightcove.