UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36

Example URL:
https://jsfiddle.net/8xxLt6gL/5/

Steps to reproduce the problem:
1. Go the the url (https://jsfiddle.net/8xxLt6gL/5/)
2. Play the YouTube video
3. Click the fullscreen button (or doubleclick the video)

What is the expected behavior?
To go into fullscreen mode with a video playing

What went wrong?
The fullscreen animation is kicked off but the video does not display properly. 

Does it occur on multiple sites: N/A

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 59.0.3071.115  Channel: n/a
OS Version: OS X 10.12.0
Flash Version: