We set up the shot in the room with the TV behind the subject.
We used the lighting set up in the room to enhance it.
Arranging the jewellery and props.
Making sure exposure is correct on subject.
We shot on 35 mm for a natural look. We had quite a short depth of field to help obfuscate the screen in the background
We found that we had to play around with the refresh rate of screen and the the shutter speed to get rid of the flicker. Once we tweaked it though we were able to remove all flicker.
Once problem with the screen is it reflected a lot of light from the rest of the room, breaking the illusion. In the end we opted to just use the screen for light.