OBS Studio is free and open source software for video recording and live streaming.
It's available for Windows, MacOS and Linux.
I'm going to install it to see what it can do but as I'm a vMix user, I'm not going to deep into it. Besides, there are already a lot of people who are doing amazing things with this software.
If you know someone who'd like to share his/her experience, please feel free to use our teacher nomination form!