I've used climbers as many have, and I've asked them of their experience and abilities, and pretty much it's pot luck whether or not they can do as they say they can. Now if I'd asked for a vid of their rigging skills I'd be able to judge a lot more quickly, and have more confidence. Admittedly, my skill in picking out some of the nations finest climbers to work with has not been affected by lack of videos, but one day I may get it wrong.