ok soa few years old but just saw this on a programme over here! No longer available
That looks like the classic: starting a perfectly executed inside loop of 1,000 feet..... at 900 feet. Unless the vehicle has a lot of power, and helicopters do not, the bottom or exit of the loop is a but slow and sluggish and has a bigger arc than the entrance turn. Looks like that is what happened in that video. Brian