It really wouldn't be that hard to fake. I could make a trip down there and visit a mining site. Act interested like a tourist, take pictures, maybe purchase some gold from some locals cheap, and resell it on my ebay, etc.
Most of their videos are dated back to March 2011. Is it really that hard to pull out a cell phone and take video of the status of their sites or showing production of gold out of their system? I could believe a mining television show on Discovery channel, because they show it, but this... questionable.