Look at the gif carefully and break it down. The girls are looking at the football the entire time it is under their control. The tennis ball only comes into consideration once they have relinquished the football.

Furthermore, they are receiving and then rolling the football to eachother with the soles of their feet, over a very short distance and at a slow pace. Rolling the ball in this way makes it easier to maintain control and to make the ball travel in a straight line, with no spin, through the gaps in the ladder, as opposed to passing it with your instep or limiting yourself to one-touch passing.

It's a basic drill with a slight twist, but still a very simple task for anyone who has reached a basic level of proficiency in the sport. The girls themselves would agree. It's choreographed to make a basic drill look great for product placement, and it's working because everybody here is fawning over it.