I'm new to the forum, and new to vMix. I'm a volunteer for our church's tech team and wanting to ask what is the best way (or if there is a way) to create a Playlist or Sequence of live camera shots only. Our service is very, very predictable usually, we have three remote fixed cameras - and during the coarse of the service, the camera shots don't vary too much. Last week I counted maybe 20 different shots in total.

im not sure that i can fully understand what you ask. You can save any vmix "project"-changes-inputs you make in any preset and then open it when you need it or append it into another preset
For the preview thing. You mean if this is possible to be done,when we load a Playlist and start plays instead of going into pgm to go into prv? So the operator choose if this camera move will go into program?
Can you explain a little more the "catalog" you need?

Ok, if I understand correctly, you want to set up some static camera positions, and when you click on that input, you'd like it to instantly switch to the saved position without performing the pan/tilt/zoom animation from wherever the camera currently is? I'm not sure if that's possible — to go there directly without the “traveling” animation.
Α way to do this,is not use the ptz function,but right click in the actual camera input in the cog icon and use "create virtual input". Then in the virtual input,you can manually use the position tab,to zoom/move your camera. This will be static position and it will stay there always and you loose the (which could include zoom ins/outs, pans, etc). Maybe the virtualset function that the program has,fits you better.

I don't have a PTZ camera myself, so I'm trying to understand exactly what you're trying to achieve, using a regular camera and the virtual PTZ feature in vMix. From what I see, every time we save a new camera move, it creates a new vMix input. These are stored within the vMix preset you're currently using, and the icons in vMix visually represent the position that each move focuses on.

You can also use Multiview if you like — for example, for today (April 6). Then next Sunday (April 13), if you open a new vMix preset, you can still go to Open → Append and bring in any of the moves you saved today, if you want to reuse them.