Allow RTMP through one of the following ports: 80, 1935 or 443 (one one).
SITUATION:
Users are currently connecting via RTMP-T (tunneling) which encapsulates RTMP packets with HTTP headers in order to connect via the firewall. It’s possible that an application-sensing firewall / security appliance could be slowing these packets down in order to examine them. Alternatively, network congestion could be a problem, which is why the QoS request is being made for the above IP addresses.