At first install the repository version, then the beta packages:
sudo dpkg -i yuri2-[version]-Linux.deb
sudo dpkg -i yuri2_ndi-[version]-Linux.deb
sudo dpkg -i pistache-[version]-Linux.deb
sudo dpkg -i dicaffeine-[version]-Linux.deb
sudo reboot
These packages are just for the testing purposes, they should not be used in the production!