How to AirPlay from MacBook Air iPhoto?

Anybody know how to reproduce a video that has been downloded from iPhone into iPhoto (MacBook Air) to Apple TV?

I recently downloded all videos from my iPhone into my MacBook Air´s iPhoto to free space. When I played the videos on my iPhone, I was able to choose my Apple TV in order to whatch it on my TV.

Now that I have the video on iPhoto, when I play it, Macbook Air does not give the option to reproduce it on Apple TV. Same goes for Youtube and other videos played on my MacBook Air.