Since you have to set DDNS. you need to connect router (to have a fix ip address). (I think you does not need to use the home PC and you can control & view through internet)
If you do not know what is DDNS, you can contact the shops. I think the sales can explain more clearly than I.
I'm now posting to sell a brand new Veo Wireless web cam that I bought 1 month ago, I bought it $2400 and now selling it $2000. You can remote moving the angle and has audio, recording function. This is the 2nd Veo web cam I bought. Since this new one is not compaible to the old one (with wire) I bought last year, I'm going to sell it and buy another one the same model as my old one. Anyway, Veo web cam is good to recommend. Pls PM me if interest.