This should have gotten a little more attention. I venture to guess it's because it is in the abstract forum. Seems abstracts are not enjoyed by realists but abstract artists can see some merit in realism. Strange phenom. Anyway, abstract/expressionism is what comes from inside. There are no books or videos that can adequately cover the bases. To find it you need to ask yourself what is it that peaks your interest. Why do you want to paint in that vein. First answer should be that I like ---------. Now ask yourself how you paint what you like. Then you try to paint it. It won't happen right away but if you keep the questions coming and you apply the paint to your ideas, you will find what pleases you. It's not important that you paint like anyone but yourself. What is important is that you understand what good painters do because before you break all the rules you need to know how to apply one when you want to pull the viewer into your web. Enjoy yourself.