For network requirements specific to video, you’ll need to apply the enterprise firewall setting, as indicated in Network requirements | RingEX. See especially:
Table 3.1
Table 3.2.2
Table 3.2.3
Table 3.2.4
When you use the RingEX app along with RingCentral Video, you must also apply the settings from Table 3.2.1.
You’ll need to apply RingCentral’s Quality of Service guidelines, including the settings for firewalls, routers, layer 3 switches, and WiFi access points.