To whom it may concern or can be interesting
I'm ready to answer all your questions.
By popular request, I decided to demonstrate on this simple example a part of a filming process with 2 angles only. What camera and light I use, how the process of filming looks like etc.
DSLR camera Canon 7D Mark II, camera crane Slidekamera (it's good for filming different angles of hands), V-screen Aputure.
Usually I film all angles with one camera, but here I use action-camera Sony X3000.