The video series is great. I'm a "self taught" climber and have watched the videos many times. It will help. I think some of the old timers could watch it to see some new techniques. When I contract a more experienced climber to help out because of difficulty, I see that the may have been climbing for 20 years and never change techniques. Yes they are very proficient at what they do, just think if they practiced or learned new techniques that have efficiency built in. I got my videos from wespur, but sherrill sells also. As for the speed line. I used the technique in the Army to move personnel and equipment, but don't have the ground men able to help set it up.
Be safe
rwilk