While social distancing often comes naturally to free-software developers,
there are still times when we wish to talk to each other. In the absence
of community conferences, the next-best alternative is often video
conferencing. While video conferences tend to be held using centralized,
proprietary systems, there are free alternatives as well. LWN recently looked at Jitsi but this effort did not stop
there; next on the list is BigBlueButton, a system that is
oriented toward the needs of online educators but is applicable beyond that
use case.

Source: LWN.net – [$] Video conferencing with BigBlueButton