To use this app please check:
1) Your smartphone must have OTG USB support
2) Your USB camera should be UVC-compatile
3) Your OTG USB cable must be correct and reliable

USB camera must support UVC standard as well as your gadget must support OTG USB.
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The app can record and save videos from any of these cameras to SD-card Google-drive YouTube.
The app is able to recognize as a motion as a smoke using camera image analysis.
This application allows 24/7/365 video surveillance by means of your smartphone camera & microphone. App saves videos on Google drive and YouTube.

ATTENTION!
Most of Huawei gadgets cannot connect a USB camera by this app!