I start from the path the cue ball wants to follow with it rolling smoothly on the cloth and no sidespin. If that leads to a pocket or anywhere else they don't want to be, then the shot has to be modified. In the case of the scratch shot at 10:35 in the original video, there are many ways to avoid the scratch. Which way you choose depends on where you would rather go. If you don't want to use side spin, hitting lower on the cue ball to get less than full follow when it arrives at the object ball is the only choice. Well, you could hit it so hard the follow action is delayed, but that would cause other problems.
I think a good way to learn the paths of the cue ball from full draw to full follow for various cut angles is the Wagon Wheel referenced above. Those paths can also be used for the shots along the rail in the video.