Good golly, people. The bar height issue shouldn't be that hard (I've seen multiple trails on this subject). Just watch the video and pause for a split second at each adjustment (or not even) and LOOK at where the bar is on everyone in the video. That's your clue!! If the bar is hip height for Cathe (5'2"), put it hip height for you (I'm 5'8" with long legs, so her height is not going to be my height).
Other heights of note: mid-thigh, just above the knee, and hip height while kneeling. It's not that hard. And it will differ for everyone based on your own height and the length of your legs. Yes, it would have been nice if Cathe cued for physical height rather than hole numbers, particularly when it's a known factor that users will be using differing equipment (Cathe - if you're reading, please keep that in mind for future videos using the towers). But it's also just not that difficult, either. Figure out what specifically works for you, and then you can mark you own tower, if you need to, because you can't remember where your hips are. I've done all three, and have really had no problems. Good luck, people!!