You can now use Siri to search YouTube on your Apple TV

You can now ask Siri to search for YouTube videos on your Apple TV. 

This new feature, which was highlighted onstage at this week's WWDC, was expected to roll out this summer. But it's available right now for all fourth-generation Apple TVs.

Here's how to do it: Using the Siri remote, simply say "Search YouTube for Justin Bieber falls down" or "Show me E.T. as a charming '90s sitcom on YouTube" and Apple TV will enter your search commands into the YouTube app. 

You can search for specific videos, people, or channels. You can also search for more general terms, like "funny cat videos." Siri's dictation search also functions inside the YouTube app.

In our tests, the searches worked pretty well. Searching for a person or artist generally brought up their official channel first, followed by assorted videos.

It should be noted that a Siri search for YouTube on Apple TV is distinctly different from doing a more general Siri search that dives into content across the 650,000 shows and movies that Siri can currently search across more than 20 different services. This is by design. 

The thinking is that combining YouTube searches with more general searches would make the user experience too messy,

Live from Apple's WWDC 2016 keynote

Welcome to the Software Show.

Apple’s Worldwide Developers Conference is the Cupertino tech giant’s once-a-year paean to its vast network of third-party developers who, for the most part, build all the apps you know (and many you don’t) and love (and many you don’t) on your iPhones, iPad, Apple TV, Apple Watch and, of course, the granddaddy of them all, your Mac.

This year Apple CEO Tim Cook, SVP of Software Engineering Craig Federighi and, possibly, a collection of other Apple executives, will take the stage at the Bill Graham Civic Auditorium (an unusual choice in and of itself) and walk us through the next versions of all its platforms. Everything from watchOS and tvOS to iOS and OS X will get a look.

The entire keynote, which kicks off on Monday at 10 a.m. Pacific Time, could last more than 2 hours. Cook and company will need all that time to get through all of that and to wow us with a more powerful Siri voice assistant and its new, highly-anticipated SDK.

They might even tease a bit of hardware, though don’t expect any new categories. It’s not that kind of event.

Seated as close to the front as possible will be your intrepid team of Mashable reporters, including me, Senior Tech Correspondent Christina Warren, Deputy Tech Editor Samantha Murphy Kelly and Apps Reporter Karissa Bell. We’ll be live-blogging right here and covering it on our social feeds. Follow along here, there and everywhere Mashable lives. We’ll make sure you get the full picture on Apple’s plans for your favorite devices. You can sign up below so you get a reminder when we kick off the live blog.