Perforce online? for small team?

Okay! Some people say they use perforce to work in a remote team,
online, using a dynamic DNS service. Thats wild!  

The cloud / server part is really really obscure even after pages
of doc. How the fuck does it work, does anyone had to do version
control on an online project. ? I would fucking love to implement
perforce / unity3d in our little team. 

please help lol.