Comment: Cool but not all that impressive (Score 5, Informative) 92
Beside the fact that people have been doing this for years, he built this on a multi-rotor heli platform. Flight times for these are usually under 10 minutes, given the power needed to keep them in the air. If he really wants surveillance with long range, he should try a fixed-wing setup, where flight times can be 30-45 minutes. DIYDRONES.COM is a good place to start.