How to filter video streams in the local network?

Question

Video

Hello! We have a lot of IP video equipment from Falcone Eye in our network. Our network is highly distributed, and therefore rather slow. This equipment has two possible video streams, this is the main stream, with a bit rate of 1-8 Mbps and an additional one, which can be reduced to 128 Kbps.
The problem is that the main video viewing software (PSS) by default turns on the main stream for viewing, and our network drops from this. Organizational measures with people do not help, because. people change frequently. Technical measures are unknown to me, because. both streams go through the same port 37777. Examining the packets in Wireshark did not give anything, although maybe I just don't know how to look.
Maybe someone knows how to filter the main stream from the additional one on the network? So that the main one does not go through the network at all? There are Cisco routers in the network, and other necessary things, but no one knows by what principle it can be filtered.