Add 'fake webcam streams ubuntu18'

fake-webcam-streams-ubuntu18.md

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+### Install the important dependencies
+~~sudo apt install v4l2loopback-dkms~~
+```
+sudo apt install ffmpeg
+```
+
+### Install v4l2loopback
+```
+git clone https://github.com/umlaeute/v4l2loopback.git
+cd v4l2loopback
+make
+sudo su
+make install
+```
+```
+sudo depmod -a
+```
+### Add Kernel Modules
+```
+sudo modprobe v4l2loopback card_label="My Fake Webcam" exclusive_caps=1
+```
+### Link Video Stream To Fake Webcam
+Find video feed in dev
+```
+ls -1 /dev/video*
+```
+
+Next up, we need to “fake” our webcam feed with :
+```
+ffmpeg -stream_loop -1 -re -i /path/to/video -vcodec rawvideo -threads 0 -f v4l2 /dev/videoX
+```
+
+### Remove the fake webcam streams
+Once you are done with the fake stream, remove the previously loaded kernel modules with:
+
+`sudo modprobe --remove v4l2loopback`
+
+This should disable the fake webcam.