Fast comment... Piotr, I know why you wear the big ugly headphones, and I see that your editing ends up blacking out a lot of the frame, focusing a lot on one side of the accordion and that this may be your style, if so, then I apologize.
But if you are doing this perhaps thinking that there is no other choice and are hiding them like this, and have internal mics on that accordion, you shouldn't really need to.
If you look at my last video, I do not wear anything *and* at the time that I am making the recording, I am listening to the backing track over speakers and there is nearly no bleeding through of those speakers in to the acoustic mics of my recording track of the accordion side (I can hear the bleed through only in the beginning silent portion of the song and I have to turn up the speakers to 65% of maximum! The bleed-through is 100% hidden once the tracks are all assembled).
But... you may say that you perhaps are using external condenser mics, and those things are super sensitive and can pick up a mouse fart at 20 meters (lol)... and that would be true!
However, there is a solution to that too, if acceptable for you. In my "Pretend" video I was using external condenser mics but no headsets. There I am actually cheating a little, I am wearing good quality Sony ear plugs and routing the wire over my ears and down my back, then routing the cable all the way to my DAW. Because of their size, they are nearly invisible in the video, unless you are specifically looking for them.
So... just saying that if you feel that you NEED to wear them and hate that look in a video as much as I do (lol)... there are easy and effective alternatives and you don't actually need to anymore.