There is a task to clone one UDP stream to multiple destinations.
In linux it can be done with iptable's TEE target. By searching the web i didn't find any similar action in routerOS firewall.
I devised another solution based on converting unicast to multicast and than back to unicast on the save routerboard.
The last step of converting multicast to unicast seems to work but not exactly. dst-nat rules are increasing counters but
streams are not leaving a router.