Mikrotik+IPTV+VLAN+l2swich?

Question

Mikrotik

Greetings to all, I can not raise IP TB on the set-top box.
The point is this.
The router receives Internet + IP-TV to port 1
From port 2 of the router there is a cable to the L2 switch (NetGear) to port 1
On the switch from port 2 there is a cable to the TV set-top box, ports 3-5 must be on the same network as the main Mikrotik ports (3-10).
What has been done, vlan2 is created and tied to port 2 of Mikrotik, Bridge-TV is created, port 1 and Vlan2 of Mikrotik are included in it, ports for Vlan2 are configured on the L2 switch, namely port 1 = tag, port2 = untag. PPPoE session is up and running on Bridge-TV. The question is that if we exclude VLANs and plug the second port directly into the set-top box, then everything works without problems, but I need exactly the diagram from the picture above.
In Bridge-TV, MAC TV boxes are visible, but there is no picture. Of course, checkboxes that allow multicast passages are everywhere.
Any idea why the packets don't reach the prefix?
Thank you in advance if you throw up an idea, or poke your nose where a mistake was made.

Answer 1

What has been done, vlan2 is created and tied to port 2 of Mikrotik, Bridge-TV is created, port 1 and Vlan2 of Mikrotik are included in it, ports for Vlan2 are configured on the L2 switch, namely port 1 = tag, port2 = untag. PPPoE session is up and running on Bridge-TV.

I need exactly the diagram from the picture above.

And what's wrong, if everything works according to the scheme?