It steers itself. Most UAVs have the ability for autonomous navigation or remote controlling- but they are capable of directing their own flight paths.
This is a demonstration of an extremely manuverable UAV whose applications could be (in a military setting) interior, urban and extremely low altitude flight. Imagine running through the woods and this thing zipping right behind you- in between trees, through logs, over rivers; all the while having a camera focused on you.
Imagine sending this guy in strapped with small explosives, smoke, or flash-bangs into an abandoned office building before sending SWAT in.