you have two options:
a.) you can police the video transfer to for example
1mb/s - so you have 1mb/s free for other traffic
the disadvantage: if there is no other traffic video can use only 1mb/s
b.) you can implement cbwfq, where you have two classes - one class for "the other" traffic for which you guarantee for example 1mb/s.
video-traffic is in the other class or class-default which has no guarantee
so video can use 2mb/s if no other traffic
if there is other traffic, this traffic has a guaranteed bandwitch of 1mb/s