help with vlan trunking

Hello guys, I just got my first routerboard 750GL and was trying to set it up in a way to replace the ISP router.
The way my isp work is VLAN35 is internet access and VLAN36 is IPTV.
PPPoE is used on VLAN35 and dhcp on VLAN36
IPTV is transmitted through multicast so I also need IGMP snooping (or so I was told)

also I am kinda in a bind with available cabling so I was wondering is something like this is possible and if yes how would I accomplish it.

port 1 is wan
port 2 through 4 are PCs
port 5 is for IPTV and if possible a Cisco SG 200-08 8-Port Gigabit Smart Switch with more PCs.

IPTV dhcp gets an IP in a 10.2.0.1/16 range, but since I want the same port to transmit regular internet and iptv I suppose I need to send different vlans to my switch and the use the switch to bind vlans to different ports (like vlan36 to port 1 and untagged on every other port)

I know how to go about setting up internet to work (create vlan35 and pppoe client on and it switch ip/firewall/nat from wan port to vlan35)
but I have no idea on what to do with IPTV, I did install multicast package since IGMP is in it but I dont know how to continue, and especially how to set it up in a way that I described.

Could someone help please. I will provide more info if needed.

If I create a vlan34 on port 5 and a bridge between vlan36 and vlan34, then on my cisco switch I designate vlan34 to port 8 and rest to port 1 through 7.
Do I even need to set up IGMP if my STB will get an ip directly from the ISP through vlan34-vlan36 bridge?