Open BroadCast Software

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Output in a virtual webcam

sudo apt install  v4l2loopback-dkms v4l2loopback-utils libobs-dev
git clone
cd obs-v4l2sink
mkdir build && cd build
make -j4
sudo make install
ln -s /usr/lib/obs-plugins/ /usr/lib/x86_64-linux-gnu/obs-plugins/

Load the module (more info at V4L2loopback Run page):

sudo modprobe v4l2loopback exclusive_caps=1 devices=1 card_label="My virtual CAM"

NB:Chrome/Chromium need the 'exclusive_caps' option

The plugin is available in

Tools -> V4L2 Video Output