Well, a drawing of the network will help. You also ned to know the ports that the cctv system neds to work. If it uses only a tcp port you don’t have to worry about answering connections from the same gateway, mikrotik will do it 4 u, but if the cctv uses rtp conections associated to de control connection you have to chose for it the wateway using mangle chains to put routing marks to chose the corrrect gateway. When routing, the answer is allways the problem.
To do a simple ip napt the only thing that you have to do is a destination nat rule in the outside interface pointing the cctv, and accept this connection wth a forward rule.
http port: 2222
media port: 6001
Intercom port:6002
Mobile Port: 6003.
DVR address:192.168.10.222
Public IP (WAN1): 10.10.10.10 lets say
WAN2 is dynamic ip
I think that ipnapt rules are correct … but
What about the /ip route export?
And the outgoing nat and masquerade rules for outgoing traffic on both interfaces?
Does it works when turning off dinamic IP interface?