Of course this is only an idea, that is far from operational use, but, we newer know what a baby will become, when grown-up....
Technically, there are semi-automatic defibrillators, that are small enough to be carried by a suitable drone, and I am sure that speed and range of device shown was thought of. I believe such system is entirelly achievable with current technology, so applause to student for developing this idea!!
What disturbs me on the video is: NO CPR ON THE VICTIM!!!
First thing to do in such situations is: call for help or ask someone to do it, then START PERFORMING CPR AT ONCE if victim is not breathing and airway is free. No technology can substitute for this and every minute lost means more irrepairable damage to brain. Also, CPR might still needs to be performed even after defibrillator is used.
regards,
hoistop