Smartphones have a solution even for that!
Now Turn your Android phone into Webcam which works perfectly to make video calls , and You need not buy an expensive Spy camera to spy on, what all you need is Old Android Phone and a Tripod or perfect place to mount your mobile, There are many android web camera apps in the play store you can download to use your Android phone as Web camera and Spy camera.
List of 5 Best Android apps to use a webcam on PC
DroidCamX Wireless Webcam
Turns your phone into a network camera with multiple viewing options. View your camera on any platform with VLC player or web browser. Stream video inside WiFi network without internet access.
Also Check: Root An Android Device Without a PC Desktop
Use IP Webcam with tinyCam Monitor on another android device or with third-party MJPG software, including video surveillance software, security monitors, and most audio players.
Videochat support (e.g. Skype, Chatroulette, the only video stream for Windows only via a universal MJPG video streaming driver)
USB Webcam needs a USB connection to use your device’s camera as a webcam. We had some noticeable lagging issues while running this app. And this app has not been Updated for a while. We Recommend to use this software for low-quality Streams, it is very lite and works smoothly for low-quality Streams
Compatible with Windows as well as Mac computers, this contender can be utilized with a host of online chat solutions namely, MSN Live Messenger, Skype, Facebook, Google+ Hangouts, Chatroulette, Yahoo! Messenger and YouTube, to name a few. And similar to a few of the other apps listed here, this one too features a free version you can try out before purchasing the Pro edition. The Pro version further provides higher video resolutions, audio recording, and absolutely no advertisements.