IGMP snooping with multiple bridges and vlans not working

ROS 7.10beta5:

i’m trying to get multicast iptv to work but fail.

Setup is as follows:

CCR2004-1G-12S+2XS main router. with 2 bridges.
bridge1 contains a few different vlans where the clients are
wan bridge contains the upstream interface to the provider

CRS328-24P-4S+ contains the same vlans.

i tried activating igmp snooping but can’t get it to work. The docs at https://help.mikrotik.com/docs/pages/viewpage.action?pageId=59277403#BridgeIGMP/MLDsnooping-IGMPsnoopingconfigurationwithVLANs are a bit unclear as i think they refer to ros 6.x.

how would a setup need to look like in order to allow clients on a vlan to subscribe to multicast traffic from the upstream provider?