While the app turns anyone with the Sony Xperia Z2 into a television station, YouTube does warn users not to broadcast inappropriate activities or copyrighted material. There is no word when, or even if, the app will eventually be offered to other Xperia models.
If you're interested in giving others a peek in on your activities, you can find the apk at the sourcelink.
New app lets Sony Xperia Z2 owners broadcast live video via YouTube
source: LiveonYouTube via XperiaBlog