Yeah, I know how to use OBS to stream. I have done it for quite a while on both YouTube and Twitch.
I was definitely putting the server URL into OBS. Just to double check, I opened the command line window and tried to ping and tracert the server it gave me – to no avail. Something is up between my DNS resolution and their server farm.
I'll probably try and fool around with it at some other time, but now was not it.