TigrisMorte , 10 months ago

for meeting and other video conferencing needs: https://jitsi.org/jitsi-meet/ , not hard to set up and get going.

and of course just video chat with no back end there is always https://vdo.ninja/ though I strongly recommend rolling up a jitsi-meet server

for streaming https://obsproject.com/

Zoom could easily be replaced at little cost other than someone's time and a donated fairly modern computer (note: businesses can often deduct the full value of the computer if it is two years or less old and is donated to a qualifying organization, such as a Synagogue).