Relevant text:
10.4 Customer License Grant. You agree to grant and hereby grant Zoom a perpetual, worldwide, non-exclusive, royalty-free, sublicensable, and transferable license and all other rights required or necessary to redistribute, publish, import, access, use, store, transmit, review, disclose, preserve, extract, modify, reproduce, share, use, display, copy, distribute, translate, transcribe, create derivative works, and process Customer Content and to perform all acts with respect to the Customer Content: (i) as may be necessary for Zoom to provide the Services to you, including to support the Services; (ii) for the purpose of product and service development, marketing, analytics, quality assurance, machine learning, artificial intelligence, training, testing, improvement of the Services, Software, or Zoom’s other products, services, and software, or any combination thereof; and (iii) for any other purpose relating to any use or other act permitted in accordance with Section 10.3. If you have any Proprietary Rights in or to Service Generated Data or Aggregated Anonymous Data, you hereby grant Zoom a perpetual, irrevocable, worldwide, non-exclusive, royalty-free, sublicensable, and transferable license and all other rights required or necessary to enable Zoom to exercise its rights pertaining to Service Generated Data and Aggregated Anonymous Data, as the case may be, in accordance with this Agreement.
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).