An overview is given in their blog post: https://blog.zoom.us/wordpress/2019/06/26/zoom-can-provide-increase-industry-leading-video-capacity/ https://blog.zoom.

An overview is given in their blog post: https://blog.zoom.us/wordpress/2019/06/26/zoom-can-provide-increase-industry-leading-video-capacity/ https://blog.zoom.us/wordpress/2019/06/26/zoom-can-provide-i... However, I would also like to know if there's more to it. Do they do any server side transcoding? Do they get an advantage by having multiple backend servers connected through good links, having clients connected to the nearest one and routing efficiently through their network? It appears that they use(d) H264 as their codec, are there some technical tricks they use to cope with variable bandwidth (do they use scalable video coding or simulcast)?