Betsy & David Art Models have prepared a document for art teachers who are using Zoom (or other video streaming services) to get models into online classes. I have watched this year as they tried various experiments for better online learning experiences, and what they have compiled for us here is a fantastic resource.
"This information is the result of collaboration with instructors who worked so hard during the early months to adapt live classes to an online format. We know from first hand experience that instructors are facing this challenge all over again in 2021. ... It isn't easy, but it can be done!" David told me.