Eight-minute propaganda video shows ISIS soldiers training in a busy city . They rappel down tall buildings as hundreds of people watch from below . Extremists practice army crawls on pavements and fitness through traffic . 'Elite ' extremist soldier gets stuck on rope after descending down building . 'They would n't worry regular soldiers ' says former SAS-man Raffaello Pantucci . Follows release of images which showed Islamic State 's 'sniper battalion '
Eight-minute propaganda video shows ISIS soldiers training in a busy city . They rappel down tall buildings as hundreds of people watch from below . Extremists practice army crawls on pavements and fitness through traffic . 'Elite ' extremist soldier gets stuck on rope after descending down building . 'They would n't worry regular soldiers ' says former SAS-man Andy McNab . Follows release of images which showed Islamic State 's 'sniper battalion '