Iframe not working in Ionic app on Android

In my Ionic project I want to add in an iframe for a Vimeo video. This is working fine when I’m testing the app on my localhost as well as on my server, but on Android it doesn’t seem to work. It says the webpage is unable to load because of the following error: ‘net::ERR_FILE_NOT_FOUND’.

This is the iframe code:
<iframe src="//player.vimeo.com/video/VIDEO-ID-HERE" width="WIDTH" height="HEIGHT" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
I have already added the whitelist plugin, which is working fine with Ajax requests to other sites, but the iframe still doesn’t seem to work. Any suggestions?

Got it. Just adding http:// before the link was enough to get it to work. Now it looks like this:
<iframe src="http://player.vimeo.com/video/VIDEO-ID-HERE" width="WIDTH" height="HEIGHT" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>