Be back next week with more.
I thought I had the cable but it seems it's not in the package so a few days till I can try it.
30 minutes is typical. If you need a HDMI camera, you need a HDMI camera. All consumer products usually fail for use in commercial applications such as say a CCTV camera which you may know I've been involved with for a very long time. I'm not a CCTV setup or installer person but one of those designers of the stuff these folk may use to set such up. That doesn't mean I know it all or what's out there but it does mean I know the limits of common off the shelf stuff (time limits due to taxes or heat.)