IGMP Configuration for multicast traffic

Dear team, I need support to configure IGMP. We have 1 SD Switch(24 port) and 4 (8port sd switch) in our network, two other brand unmanaged switches also on the same network.
6 Crestron NVX devices are installed on the network for transmitting/receiving Audio and Video on the network.
As shown in diagram devices are connected.

IGMP in all 5 peplink switches is enabled.
But we can receive multicast data only if Tx and Rx on same switch.
In our setup we have Some Tx/Rx on three different peplink switches so not able to receive multicast data on all devices.

I think this is due to of Misconfiguration of IGMP.
Let me guide how to configure in right way.


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