Multicast without router

I have a question using Multicast without a Router. The topology with the ip addresses is attached.
Some questions:
Is this Setup Working? (due to different Subnet)
I assume Yes , because of IGMP snooping, SW2 and SW3 knows where to forward the Multicast traffic.
Is the main reason für a multicast router to have a querier in the network ?
Thanks a lot in advance

Best regards , Florian

A post was merged into an existing topic: IGMP Snooping without Router