Solved! How do i disconnect from youtube?

[fredrated]

I apologize if this is the wrong place to ask, but...
A friend showed me how to cast a youtube video to my vizio tv from my iphone. It worked great!
But I can't get it to disconnect! I turn the tv off and back on and the tv reconnects and youtube is soon playing on hdmi2.
I reset my router, but when it comes back up my vizio reconnects and continues to show youtube.

How do I get the tv to stop connecting to youtube?
Thanks in advance for any help you can give.
-Fred

 

[helpstar]

disconnect the iphone connection, use the smart cast app to disconnect