I became aware of this website. Because I previously bought Will Terry's "Digital Painting in Photoshop" video from his personnel website. He now only sells his videos through folioacademy.com. The website has just been updated and is easier to navigate.
Video prices range from $9.99 to $29.99. And work on both Mac, and PC computers. The video works on all versions of iphones, ipods, ipads, and other smartphone devices. I also like that they use paypal for money transaction. Which means your credit card is secure.