There’s so many issues involved. Beacon systems can be used (but might not work well in metal enclosures like in the video). Just accurate trajectory followin

There’s so many issues involved. Beacon systems can be used (but might not work well in metal enclosures like in the video). Just accurate trajectory following is very difficult in itself depending on the speed/accel/turning. The cars in the video were moving and so the drone had to be time synced. Same with the stuff inside the factory.