OBS Studio

Enable virtual camera

Source

sudo dnf install https://mirrors.rpmfusion.org/free/fedora/rpmfusion-free-release-34.noarch.rpm
sudo dnf install v4l2loopback kmod-v4l2loopback
sudo modprobe v4l2loopback devices=1 max_buffers=2 exclusive_caps=1 card_label="VirtualCam"

# If modprobe fails run this bfore modprobe
sudo depmod

You can configure some settings for your new virtual camera with v4l2loopback-ctl.