Daein,
Setting this up manually could get complicated. I think it is probably best to open up a case with GTAC for assistance:
How to contact Extreme Networks Global Technical Assistance Center (GTAC)
Is the camera constantly sending the stream? Does the stream have a VLAN tag? If so, that VLAN needs to be created and the source and destination ports added:
create vlan
conf vlan add ports tagged
Then you need to add a static FDB entry for the stream destination mac on the listener port:
create fdb 91:E0:F0:00:FE:00 vlan ports
Ultimately, QoS needs to be setup as well, but you shouldn't need that for a single stream. I would see if you can get the stream forwarding first.