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There is no definitive standard in place for how DDNS services verify your IP, so each service included has to be hardcoded into the router. Hence all we get are a limited number of the most popular DDNS services.
If you are trying to use this particular service for your CCTV, you may find that you can actually set it up on the CCTV box directly. Otherwise, I'd probably suggest using NO-IP, sure having to log in once a month is a bit of a pain, but it is (for me at least) super reliable!