Failed to execute 'postMessage' on 'DOMWindow': The target origin provided does not match the recipient window's origin?

Question

YouTube

I had to make my own button for youtube video, I had to use youtube iframe api.
Everything worked, only in the console this error
Failed to execute 'postMessage' on 'DOMWindow': The target origin provided (' https://www.youtube.com ') does not match the recipient window's origin (' champ-food.ru ').
It does not seem to affect anything, but it is an eyesore. How to remove this error?

Answer 1

Where there is a video call in the iframe, try changing youtube.com/....... to https://youtube.com/.......

Answer 2

Suddenly, to whom it is useful. You need to add to the parameters:
origin: location.hostname