@george1421 Thank you for your quick reply.
I am currently trying to get the multicast cloning to work over several vlans as in your instructions.
I am using OPNsense instead of Pfsense. Unicast works without problems, but we have many of the same PCs and so multicast would make sense.
Part 2.7 would be relevant to check that I have not forgotten any ports.
Part 3.1 and 3.2 as I have never worked with an IGMP proxy.
During a short test, everyone stopped before cloning and waited. Would assume it was because of my wrong IGMP configuration as I didn’t see any blocked ports on the firewall.