There is not perfect way on this unless you know all the related domains for services above. All services above may use random ports or TCP80 or TCP443. So difficult to differentiate.
Below is the outbound rules that may help.
HTTPS_Persistence
Source: Any
Destination: Any
Protocol: TCP
Port *: 443
Algorithm: Overflow
Overflow Order: 1)WAN1 2)WAN2
As mentioned, there is no perfect way to redirect traffic for Skype, Youtube, unless you know all the related domains or IP for Skype and Youtube. The suggested rules just redirect TCP 443 to WAN1 and others to WAN2. This is the best we can do.
You can force other users to WAN2. Outbound rules will look like this.
HTTPS_Persistence_Your IP
Source: <Your IP>
Destination: Any
Protocol: TCP
Port *: 443
Algorithm: Overflow
Overflow Order: 1)WAN1 2)WAN2
AnyAny_Your IP
Source: <Your IP>
Destination: Any
Protocol: Any
Algorithm: Overflow
Overflow Order: 1)WAN2 2)WAN1
As mentioned here, there is no perfect way to do this. Skype is using TCP port range 1024 and above, 80 or 443. If you forward all these ports to BBTS, connection for non-Skype application will forward to BBTS as well. Please find the URL below for more details:-