To make my video conferences private and secure I have implemented the open source video conference solution Jitsi on my website. You can now reach it through https://jitsi.arvidortwig.de
It’s open source, based on webrtc, secured by ssl (https) and there is no registration neccessary. I also don’t save any logfiles or anything else. Feel free to use it for you corona-conferencing 😉
The android smartphone app is available on F-Droid: https://f-droid.org/en/packages/org.jitsi.meet/