I got one of those $40 USB digital microscope cameras and it works very well for me.
Since it has its own flexible stand, I do not need to hold a device, which allows me to see what I am doing in real time.
The built-in LED flashlight provides good lighting over the covered area.
They are available on-line from various vendors.
Just make sure to get the one with the flexible arm stand, as it has a wider reach than the other stand.
73 de W4OED