I cannot unpair my Android smartphone YouTube app from my LGTV.
On LGTV: I went on YouTube app and log-off my account. I also disconnected all mobile devices from it, what should (?) suffice in case my cell phone is stolen or something else happens, but...
On Phone: I cleared all app data and cache for YouTube app. But still, after starting the YouTube app, my LGTV is still registered and I can make YouTube videos play on LGTV.
On YouTube account: I removed the LGTV from YouTube configuration, but still any account on the phone can make videos play on the LGTV.
There is something that is being left on my smartphone that still allows it to control the LGTV.
The next step (that I am holding) is: completely reset my phone and research some way to completely reset my LGTV (if it makes any difference).