The image results are not always a match for the search you put in. The lenses showing when I searched are the Contemporary models amongst others of different focal ranges. If you worked before with a crop canon camera, the 50mm lens would effectively become a 70(ish)mm lens, which is too long for a small room.
The depth of field is associated with the
f number - 1.4
1.4 is a very shallow depth of focus if you are physically close to the camera, while around 5.6 is pretty standard for basic lenses., but will not blur the background so nice.
As I said before, but Nigerian Prince doesn't quite agree with, I think a wide lens (16mm) will distort the room itself, but if that is not an issue, fine. As bbbaddd says, you are what visitors are interested in, not so much the surroundings. But I wonder if you stray too much from that sweet spot with a shallow depth of field, will you become distorted and blurry too? The camera would have to have good tracking to keep you looking good if you move around a lot, I would have thought. .
But again, I haven't really used the video function of my camera gear and would think Nigerian Prince's advice would be more qualified.
Here's a handy tool to work out the dof
This Depth of Field (DoF) calculator will help you get the creative control on the design of your photos. Decide the zone of sharpness you need to tell the story you want and get your message across.
www.photopills.com