My 0.05c to your case:
Why not to consider deployment of QoS techniques and the start point should be prioritization of video traffic.
I believe congestion management is not going to help you much because you cannot slow down video transmission like you can slow down TCP.
Some of the queuing techniques should be considered too.
Be very careful with congestion avoidance techniques like WRED because you definitely do not want to discard Video packets in any way.
Regards,
Vakhtang.