After seeing the "youtube" video I can say that there's really no easy answer, running away is alway's the best, but if you must fight find something around you which you can use as weapons as an equalizer to defend yourself with. With weapons in hand run separate them, so your facing fewer at one given time, and what every weapon you have just swing and don't hold anything back, and when the time is right run to safety, that's the best I can say, like I said there's no easy answer for anybody, movies make it look easy, but real-life is not the same as a movie. Ken