Automatic door sensors are in my experience universally infra red. In fact I don't think I've ever seen any camera technology used in that context. Are you saying they used cameras to open the doors?
It's video conferencing software. Makes sense that they might put together imagery which might suggest people meeting from different corners of the planet. But sure, I get your point. I didn't notice this myself, but I have been living on side of the planet opposite from where I was born for the past decade.