One easy fix that I’d like to mention is to make sure that you are pasting this URL into your browser: 192.168.254.1/cockpit. If you try to use the 192.168.254.1:8080 address you will not get video feed with the HD camera.
Could you tell me more information about the other details related to your HD install? Are you saying that you and your teammate are connecting to the same ROV and everything works fine for him but not for you? More details about that will help me get to the bottom of your problem.
We wrote a troubleshooting guide that helps debug connectivity problems, go here to try it and see if it helps solve your problem:
Let me know how that goes and we’ll take it from there.