Before using this app check 3 things:
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1) Your gadget can support USB OTG. This means that you can connect different peripheral devices (e.g. USB flash drive USB-disk etc.) to your gadget via USB.
2) USB camera must support UVC standard. This means that it can be used in Android.
3) A high-quality micro USB OTG cable must be used to connect the USB camera and gadget. This cable should not be very long - the shorter the cable the better.
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USB camera must support UVC standard as well as your gadget must support OTG USB.
The app can record and save videos from any of these cameras to SD-card Google-drive YouTube.

How does it work?
After you have installed this app please reboot your gadget.
Choice "Monitor" icon in the app.
1) Videos. To start video recording you need press big button in the left top side of the screen.
2) Photos. To make the photo you need click "photo" icon left top side of the screen below "Videos" icon.

Have you any questions?
http://endoscope.realvisor.net