I was playing with this ferret for five minutes before I took this video. It’s not a trained ferret. I am not exploiting it. It does not care that it is being filmed. The brief, light tap I made on the glass is no louder nor more disturbing than the sound that would be made by gently closing the lid of the cage or from one of the toys bouncing against the side of the enclosure during play. I don’t think you understand just how light my tiny tap was. The situation you witness here is more similar to gently knocking on a door to announce your presence to someone who has been expecting you.
I’m not sure why you want to put me in a cage and film me. If that’s something you’re interested in exploring, I’m sure you can find consenting partners elsewhere.