I see that that you want to create a GUI in which you want the flexibility to switch between cameras listed in a list box.
You can refer to the following MATLAB Answer's resources to do so:
- https://www.mathworks.com/matlabcentral/answers/855610-select-different-cameras-with-a-drop-down-menu
- https://in.mathworks.com/matlabcentral/answers/1780620-how-to-select-camera-like-drop-down-button-app-designer
I hope this helps!