That was the perfect input!
in my case:
##Install multicast on Mikrotik Router:
https://mikrotik.com/download (extra packages)
(Drop the file into files dialog on mikrotik router and restart the router!)
##After restart use terminal:
#Create Bridges and Netowrks:
/interface bridge
add fast-forward=yes name=Bridge-WLAN protocol-mode=none
add fast-forward=yes name=Bridge-LAN protocol-mode=none
/ip pool
add name=dhcp_Bridge-WLAN ranges=172.20.200.1-172.20.200.253
add name=dhcp_Bridge-LAN ranges=192.168.1.101-192.168.1.253
/ip dhcp-server
add address-pool=dhcp_Bridge-WLAN disabled=no interface=Bridge-WLAN lease-time=2m name=DHCP-WLAN
add address-pool=dhcp_Bridge-LAN disabled=no interface=Bridge-LAN lease-time=2m name=DHCP-LAN
/interface bridge port
add bridge=Bridge-WLAN hw=no interface=Bridge-WLAN
add bridge=Bridge-LAN hw=no interface=ether2
/ip address
add address=172.20.200.254/24 interface=Bridge-WLAN network=172.20.200.0
add address=192.168.2.254/24 interface=Bridge-LAN network=192.168.2.0
/ip dhcp-server network
add address=172.20.200.0/24 dns-none=yes gateway=172.20.200.254 netmask=24
add address=192.168.2.0/24 dns-none=yes gateway=192.168.2.254 netmask=24
#Mangle Rule
/ip firewall mangle add action=change-ttl chain=prerouting disabled=yes dst-address-type=multicast log-prefix=TTL+ new-ttl=set:64 passthrough=yes port=1900 protocol=udp
/ip firewall mangle add chain=prerouting action=change-ttl new-ttl=set:64 passthrough=yes protocol=igmp log=no log-prefix=""
#Routing (ip Address is the Network-Address from Bridge-LAN!) -> Check entries: Routing -> PIM
/routing pim bsr-candidates
add interface=Bridge-WLAN
/routing pim interface
add interface=Bridge-WLAN
add interface=Bridge-LAN
/routing pim rp add address=192.168.1.254
/routing pim rp-candidates
add interface=Bridge-LAN
THX!!