It wasn’t complete config, it just showed changes from yours, so you’d still need to keep your original “Internet” VLAN interface for example. Unfortunately, I can’t help you with IGMP snooping, I know what it’s supposed to do, but that’s about it. But I’d rather avoid that completely and go with as transparent config as possible, i.e. the kind I suggested. You can read more about configuring bridge/switch this way in this popular thread: