Hello Vanya,
Your traffic should only be flooded if your switches don’t have a “router port” for multicast in your topology. This might depend on your switch model / IOS version though. Most switches will drop membership reports and flood your multicast traffic.
Adding snooping querier to your interfaces adds a “router port” to the topology so it solves the problem of flooding, not causing it.
Do you have multiple VLANs? Is it enabled on each VLAN?
SW1#
interface vlan 1
ip igmp snooping querier
There is no need to enable PIM on any interfaces in your case, you only need this if you want to route multicast traffic between subnets. IGMP snooping querier is enough in a L2 topology.
Rene