µStreamer - Lightweight and fast MJPG-HTTP streamer
Looks like he uses uStreamer project to do it: https://github.com/pikvm/ustreamer
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.
A pure C Mjpeg-over-HTTP server
2 projects | news.ycombinator.com | 18 Jan 2022
3x USB webcams on a Pi4, 1080p/25fps too much to ask?
1 project | reddit.com/r/octoprint | 11 Sep 2021
USB and video handling
1 project | reddit.com/r/tinypilot | 17 Aug 2021
Added RPi camera to Mars 2
1 project | reddit.com/r/ElegooMars | 22 Dec 2020
Just Lost My Entire Home Server Any Ideas
2 projects | reddit.com/r/selfhosted | 7 Feb 2021