Force all streaming video to specific gateway?

Question

We're running an educational setup in a rural area with limited internet access. I have two gatewys configured: 
 
 DSL @ 3 Mbps 
 LTE/4G @ 20 Mbps but subject to 'network management' (i.e. throttling) if we use too much data (provider won't specifiy how much is too much). 
 
 Is there a way to route all streaming video (the largest bandwidth hog) to the DSL gateway? 
 I know this can be done by user, group, service, etc - but I can't find a clear-cut way to do this for streaming.

LuCar Toni · Answer

You cannot split the traffic depending on Application / Web to specific gateways. 
 XG can only match traffic based on Source IP (User), Destination IP and Service (443) and force a specific gateway on this traffic. 
 
 Everything on "Advanced" is already matched with the criteria mentioned above.

LuCar Toni · Answer

You are completely right in this approach. 
 The point is, if you have two Gateways and want to force for example Youtube to go to Gateway A and the Rest of the HTTPs Traffic to Gateway B, this is not possible. 
 It uses HTTPs Traffic (443), so XG cannot split the traffic properly. 
 
 Application Control is a Block/allow mechanism. So if the criteria matching above (Source / Destination / Service), XG will perform the block / allow. 
 You are stuck now in this Firewall rule and we are not considering any other firewall rule below (First match).