How to set up Light for Detail Videos for my character (Enemies & Bosses)

Hello, I want to sell my first model. I find these Detail Overview Videos to be very good. They light up the character perfectly while keeping the environment empty and dark.

But when I try to set it up, the scene seems too dark, and the monster’s detail is not showing. If I increase the light, the surrounding background will also be brighter.

How can they keep the entire character that well-lit and without dark spots ?? While keep environment dark and empty