You can't make a keypad do that. It's not permitted to show any detail to a level 1 user ie non permitted user. That's why it beeps etc till a level 2 user proves presence, code or fob. Regulation issue
assuming as you say 0abcd then its not on default codes. But I only know the uk panels and they may have different defaults. I think they are printed on the pcb in the aerial area.
if the code was correct it wouldn't wait for any more digits
why not use a hdmi to dvb modulator. A decent hdmi extender will work but im struggling to find a v2.1 on at 15m for my own house or even a 2.1 cable
I have heard of some success using fire sticks and the recorder android apps but never tried it. I use mythtv and zm fed from a sw ahd dvr over rtsp
On hkc you can't access engineers without user authorisation everytime via the keypad.
The bells thing is non compliant and an issue I have if you use the default bells only option. Engineer access needs authority regardless of proper comms etc