Watched the video real quick. Looks like there were some street signs which are usually aluminum. Washers, dryers and dishwashers have electric motors and all appliances have circuit boards that you can sell to people who test them, sometimes timers and other parts too. Appliances with handles and knobs you can often harvest for those handles and knobs to sell on ebay. Microwaves have good sized transformers. Gas dryers and ovens have brass valves. That place paying C1.40/lb for aluminum is definitely just buying 6063 and 6061 extrusion at that price. That's above end user buy price for cast aluminum.