IPTV vlan forwarding

I’m trying to forward or bridge the vlan from the ISP as they have restricted access to serialized STB units. I have hEX poe and have vlan 3 for IPTV and vlan 4 for internet with PPPoE.
Current config is adding vlan 3 to an “IPTV bridge” and create and add (to the IPTV bridge) vlan 100 to the local LAN bridge and untag it on a AP that can filter vlans, while doing this I see that the IPTV is flooding the network with UPD traffic. I cannot seem to be able to figure this out.

/interface vlan
add vlan name=IPTV-provider vid=3 interface=sfp1
add vlan name=inet-provider vid=4 interface=sfp1
add vlan name=IPTV-local vid=100 interface=bridge

/interface bridge
add name=bridge igmp-snooping=yes
add name=IPTV-bridge igmp-snooping=yes

/interface bridge port
add interface=IPTV-provider bridge=IPTV-bridge
add interface=IPTV-local bridge=IPTV-bridge

add interface=ether* bridge=bridge

/firewall >default config<
IP address >default config<

The AP’s are all configured the same:

/interface bridge
add igmp-snooping=yes name=bridge1 vlan-filtering=yes

/interface bridge port
add bridge=bridge1 interface=ether1 pvid=1
add bridge=bridge1 interface=ether2 pvid=100
add bridge=bridge1 interface=wlan1 pvid=1

/interface bridge vlan
add bridge=bridge1 vid=100 current-tagged=ether1 current-untagged=ether2

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One reason why you’ve got no responses yet may be that it is not really clear what actually doesn’t work. The concept of translating VID 3 to VID 100 on the hEX PoE is clear and implemented correctly, but the requirements of various IPTV devices and providers vary. Normally, the IPTV device subscribes to multicast groups using IGMP, and the IPTV head-end sends each TV channel to a single multicast address. And, by design, multicast means “flooding” at bridges/switches which do not understand IGMP or static filtering rules on their own.

So describe your actual trouble better to get a better advice. It’s also not clear (at least to me) what means “restricted access to serialized STB units”.