Sorry, still confused.
For example, "TV-boxes only require a network with igmp enabled and no need for querier (as i was told)." doesn't make sense. Unclear what enabling IGMP on a network means. IGMP is needed for multicast routing, as it is used so that multicast traffic is routed between the multicast source and multicast recipients.
If multicast source and multicast recipients are in the same L2 domain, IGMP is not needed unless you want to also use IGMP snooping.
Since IGMP is needed for multicast routing, multicast routers are IGMP queriers. When there's no multicast router, and you want to use IGMP snooping, it needs a IGMP querier, which IGMP snooping capable switches often support, i.e. being a querier in lieu of the non-existent multicast router.
Since you've enabled both PIM SM and DM, it's possible you're doing flood-and-prune multicast routing. Which isn't usually as efficient as SM alone, but again, if you're also doing IGMP snooping, unless you've bumped into the conditions I described in a prior post, your hosts shouldn't even "see" multicast packets they have no interest in.
At this point, it seems to me, you're possibly not well versed in multicast, which might lead to the issues you're seeing and/or what you have in mind for a "solution" might not be an effective solution.
If the foregoing is true, I would suggest more study of how multicast works, or see if you can retain someone locally, with multicast experience, to assist you.
