I can't open any of the pictures either. I can't imagine how he is using Clecos with butt welding. We use Clecos all the time to hold posts to panels that we rivet with buck rivets, but I can't imagine how one would use them to hold two pieces of sheet metal together with butt welding. I can feature using them to hold overlapping flanges and then welding the holes shut, but I guess my little brain just isn't imaginative enough to feature Clecos in butt welding.
