How do I watch Live YouTube on AppleTV?

The Democratic convention is available live on youTube @ http://www.youtube.com/DemConvention.

I have no trouble playing it in either Safari on an old mini-mac or Chrome on a brand new MacBookPro.

But I cannot find the stream on my AppleTV.

I subscribed to the connection and I get separate recordings that I can play on Apple TV.

But the LiveStream is no where to be found.

Anyone have a clue?

Is there some other site that will provide me with the Stream to AppleTV?

I've connected my older mac-mini to the HDMI so I'm getting what I want, but

I want to use that system for something else.

Thanks