Multi WAN route traffic based on Application?

Hey Folks,

Hopefully someone can give me a pointer on this. I have an XG firewall with 2 x WAN connections:

Connection 1 - 5Mb un-metered ADSL

Connection 2 - 40Mb 100G per month 4G

In order to reduce consumption of my 4G connections fixed monthly allowance I want to create a rule that routes all 'High Bandwidth' traffic over Connection 1 and leaves everything else to go over connection 2.

I've created a standard rule [User auth off] [LAN/Any/Any]>[WAN/Any/Any] [Application Rule YouTube Accept]-[Gateway1]-Accept.

With this rule enabled _ALL_ my traffic regardless of whether it's to Youtube or not goes over connection 1.

Creating a similar rule but instead using TCP Services as the filter everything works as expected, it's as if the 'Application' rule is being ignored and it's only matching the standard FW IP/Port rule.

Being a home user I do not use user auth, hence per user rules option is disabled. Any pointers?

Cheers

Simon