Hi Vitruvius,
I'm sorry to hear you are having troubles with remote access. Are you attempting to sign in while your iPhone is connected to the same network as the machine running Sighthound Video, or are you using your cell network? If you are connected to the same network you will need to use the "Internal address" and if you are connecting from outside this network you will need to use the "External address". These links can be found in the remote access tab in Sighthound Video. For more details please see the following article:
http://www.sighthound.com/support/how-enable-remote-accessThere currently is a bug in this version of the iOS app that requires you to leave the "http://" off of the IP address when signing in. If your IP address is listed as "http://75.75.75.75:8080" you will need to enter it as "75.75.75.75:8080"