Why does my phone keep casting to my TV?

Brett from Woodbridge, NJ

Episode 1492 (1:38:26)

YouTube app

Brett has issues accidentally casting to his TV while watching YouTube. How can he stop doing that? Leo says that something on the TV or streaming box is enabled. It's probably a Smart TV feature. Can he get rid of the button in YouTube? Leo says no, it's part of the app. He can go into his phone settings and disable casting, though. He could also look in his router and disable casting there. If his cable router doesn't do that, then he can buy his own router for $100, and it'll pay for itself in no time. Then he can block it that way, too.