I was never much for accurately visualizing contact points. Sure, from behind the ob it's very easy to see where it needs to be contacted in order to be sent toward the pocket. But keeping that spot in focus while standing behind the cb was not so easy for me.
All aiming systems have one final goal -- to find the aim line. Contact points, CTE, STD and many other systems require visualizing at least one or more reference lines, then from this reference one must shift or pivot their cue accurately to the final aim line. If you're off on your reference visuals or off on the parallel shift or half tip pivot, the your final aim line will be off too. And when you miss the shot you'll have to figure out which step caused the miss.
With Poolology the reference line is through the center of both balls, and the ob gets a position value. The aim line is then calculated/derived from this. There is no cue shifting or pivoting from any visualized reference lines or points.
For the op, I found the best CTE videos to be Stan Shuffett's. You just have to weed through and find the ones you can understand. Here are three that shed a lot of light on it for me. Knowing how to do it is one thing, and it takes practice. Making it work consistently another thing, and it that requires more practice.
https://youtu.be/2KwI_62Npos
https://youtu.be/Lrs0aWd9TD4
https://youtu.be/4iuvQT7dwfs