"Ok, so some research has come to this...
Turns out it's a problem with sync levels on the camera output. There are OSD firmware patches to fix the sync issue, so I suggest you find an alternative firmware with that in or patch your own. I for now am…"

"Did you ever fix this? I am having the exact same issue.
I get a nice image from the camera with no overlaid text OR I unplug the camera and get a nice overlay page with no video."