Entry of very simple program via the Altair 8800 front panel to demonstrate single-stepping and running a program, and what can be learned from the address lights while a program runs. site 
YOUTUBE EV1ki6LiEmg Altair 8800 - Video #2 - Front Panel Programming
https://altairclone.com/downloads/interview.mp3 Interview with Mike Douglas, creator of the Altair 8800 Clone, by David Greelish, computer historian.
The Altair Experience page
YOUTUBE Q5LjkL5b4n8 Fully Functional Altair 8800 Built from New Equipment in 2018
A fully functional Altair 8800 built from all new boards and equipment available in 2018. See http://deramp.com/altair.html for more information.