how to use simple queue ?

Hello ,
I have a router that provide wifi to my office , and it also connect to camera.
I notice that if to many people connected to the wifi - the streaming is slow .the max band I need is ~ 1.5M for the camera (So I want to make sure I have this before I can “give it” to the WiFi clients)
now I want to make a queue that will allow me to view the video and reduce the wifi clients
the video is not going to be used all the time , so I am willing to take this “lost” for the clients.
I don’t want then to disconnected whenever I enter to see the camera , just to give the video priority.

this is what I did:

/ip firewall mangle
add action=mark-packet chain=forward in-interface=Remote new-packet-mark=Remote passthrough=yes //this is the connection I use from my office to the router
add action=mark-packet chain=forward in-interface=wlan1 new-packet-mark=Not_Remote passthrough=yes //WIFI client connections

/queue tree
add name=Remote packet-mark=Remote parent=global
add name=Not_Remote packet-mark=Not_Remote parent=global priority=8

is this what I need to do?

Thanks ,