The F8 firewall gui is more useful for entering ports to be opened and making certain rules that are entered at the bottom of the iptables (in iptable-save format?)
And some other things.
But the initial popup remains in that
"Use the gui, always use the gui."
roll you own iptables with an editor.
I did not see any special ports or name called "video capture"
What ports are you needing and are they udp or tcp, input or output, or both, on a client on a subnet or a gateway or a sever in the DMZ? That may exceed the gui's design but it all depends on how you code the rules or add the ports.
Do the Math