The Alarm.com SkyBell HD(ADC-VDB101/2) has not been discontinued as far as I am aware but I will follow up here if I come across confirmation.
Alarm.com is also compatible with the SkyBell Slim 2 (VDB105X/106X) and their most recent doorbell the ADC-VDB770.
Camera specs for various compatible cameras can be found here
Regarding a lack or recording, check to make sure the rules are not paused and are set up correctly and if they are, delete the rule, wait a few minutes, recreate the rule, then test for resolution.
Some additional troubleshooting steps for cameras not recording can be found below: