Roman military tactics in modern riots?

[Epictetus]

Here is a video I've seen described online as a demonstration of how modern riot police can use ancient Roman military techniques. To be honest, I don't know anything about Roman military techniques besides the tortoise formation, which does seem to be popular among modern-day riots. Are these really Roman maneuvers in the video? If so, what am I seeing? How would these maneuvers work on the ancient battlefield?

http://www.youtube.com/watch?v=uREJILOby-c