You know what else has Group Video chat... HiveTalk.org And it supports nostr, zaps, nwc nostr:nevent1qqsq6wvhzw2xu76l99jczvl940dxjvddfdxyvs673jqtnh9zttm9w7spz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsygrkcud2uwjfruweamz8ewshug5umfq38g9mkmn2u9mk6ajru2w2lgpsgqqqqqqsl43dqe