Pixel art is much more than a video tutorial. And even with good detailed tutorials on pixel art (there aren't in the RO English spriting community yet, I'm working currently in order to change that. Meanwhile, check in PixelJoint and WayOfThePixel/Pixelation), you won't be a good pixel artist without time and practice. You may understand the concepts, the methods, the theory, but how to place each pixel in your work, and how to select the exact color you want to make it fit your needs, that is just not easy. You have to try, fail, try, fail, try, have success.