How to split a MultiCast stream?

Question

Computer networks

Hello!
The question is as follows:
we have 2 MikroTik routers, let's call them MikroTik1 and MikroTik2.
MikroTik1 is connected to the cloud, MikroTik2 is not.
The Multicast stream comes to the first port of Mikrotik1, is given to 1 device that is connected to the port of MikroTik1.
It is also necessary that multicast goes to the second device connected to MikroTik2.
At the same time, the port that connects 1 and 2 MikroTik forwards the local network and the isolated server network, in addition to multicast.
Question: how to implement multicast for MikroTik2?

Answer 1

Raise the third vlan and wrap it in it?

Answer 2