A:AnswerUnfortuantely, without troubleshooting the issue in real time, it would be just a guess at what the fix is. Your best option is to contact the HP support team so they can troubleshoot it with you in real time to figure out why you're getting those display problems.
A:AnswerIt won't do full resolution for 4K
I'm using a older pc with Windows 10. If the PC has a USB-C port you may see full 4K. The picture will be great either way. I have two of these monitors.
A:AnswerBoth of the HDMI ports are input ports, so you can't use one to output a signal to another monitor. If your computer has two outputs, you can do it that way, or you can get an HDMI splitter to send the signal to the two monitors.
A:AnswerI had to buy a camera/microphone. Got a nice one with great display for not mjuch money. Being portable it allows shooting from different places and not just the top of the monitor.