There is some very competent handling there and their formation skills are good - but does anyone know how old that video is and if they are still going?
Their display involves sideways and backwards speeds you wouldn't normally expect a Robbie to do and I would think they are at the limits of their control travel on some manoeuvres but it seems to work for them.
The leader is ex-Army, are the rest ex-mil as well?
Google Jim Cheatham who died in 2009; this was a 2005 display.