If you want to hide the youtube-icon then the parameters “?modestbranding=1″ have to be passed in iframe src after ”?”.

<iframe width="560" height="315" src="https://www.youtube.com/embed/q5jEY92Amgw??modestbranding=1" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>