У вашего броузера проблема в совместимости с HTML5
The santuko is an asymetric throwing knife design. Developed by Bo McNees originally as a rotator the knife can be thrown well no-spin, half spin and even like a bo shuriken. This sport thrower is 18.8 oz (533 grams) in weight, 14.5" (36.8 cm) long and 1/4" (6.35mm) thick. I have two Santukos of the same profile, the one in the video is half again the weight but is as easy to throw and can be used for hard target throws like slate busting.