Here's a screenshot from YouTube's app for Android:
"With Chromecast available in 18 countries and YouTube live streams happening on the regular, we wanted to share one of our favorite ways to use Chromecast. Head to one of the live streams in the YouTube app, just press the cast button, then kick back and enjoy these live events from the comfort of your living room," informs Google.
Here are some live streams you can watch:
* ASP World Tour (surfing)
* Adidas Dugout live from Rio (football / soccer)
* Birds, puppies, cats and more streaming live @ The Pet Collective
* other live streams
Apparently, "YouTube Live streams cannot be viewed from Germany." Here's an explanation: "because of the German law (RStV), you must have a broadcast licence from the media authorities when you make a live stream that can reach more than 500 people at the same time. Not getting one would result in a fine of up to 500000€. "