I have a video call device which only works with driver-free usb webcams attached. Since I dont have a USB webcam at hand, so I wonder if I can make Android phone (rooted) emulated as a driver-free webcam via USB.
I knew some apk could work e.g. DroidCam, but they requires extra clients installed on Windows. I do not want IP webcam or wifi connection or http or VLC to view them, but plain old USB webcam.
Please note I am not asking for apps that can read videos from OTG usb webcams. It's the reverse, making Android output videos to USB.