1) See above
2) I have timers set to when action happens start timer, if timer running restart timer. Use this for bathroom lights.
3) Touchscreen or TV screens? I don't use the touchscreens for cameras, I have a NVR wired as a source to my AV setup. I do have when doorbell pressed press pause on TVs and pull up doorbell camera for 30 sec then back to previous source and wait. Some really fun stuff if can do!