Hi, guys.

I have a MacBook Retina running on 10.11.5 and ATV4. 

I am streaming a TV Channel online (in either Chrome or Safari).

I would like to be able to AirPlay this in Full Screen to my TV while, at the same time, I continue to use my MacBook "normally" for browsing, etc.

If you could please post exact step-by-step instructions on how to do it as I simply don't seem to be able to grasp it.

Thank you very much in advance. 

(If it helps, here's the link I'm watching in full screen: HBO 3 Online )