Hey guys, Jim from BeastSkills.com here. In this video I talk about the one arm negative. Check the One Arm Chin-up tutorial for full description of this exercise. (http://www.beastskills.com/OneArmPull.htm)
This video is to show you the actual speed I think you should try to achieve with the negative in order to get the most out of it. This is something that you were unable to see in the written tutorial. Hope it helps, good luck with your training!