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I have a form that is iframed into a web page. Upon completion of the form, a YouTube video is displayed from using iframe embed.
When I enter full screen mode of the YouTube video, nothing really happens.
Is the fullscreen of the nested iframe constrained by the dimensions of the parent iframe?
Adding
allowfullscreen="allowfullscreen"and altering the type of YouTube embed fixed my issue.I had to add allowFullScreen attribute to the "parent" iframe. The case of the attribute does matter. I don't think Firefox or Edge/IE11 has a browser specific allowFullScreen attribute. So it looks something like this:
<iframe allowFullScreen='allowFullScreen' src='http://api.youtube.com/...'/>