raspberrypi VS ustreamer

I bought one of these https://www.amazon.com/gp/product/B091F7YSCD/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 to play around. Found it convenient initially but the lack of an on-board reset button was annoying. Found this on YT https://www.youtube.com/watch?v=XRq9Gs6X2Dk after which I eventually made my own using Kicad (there are plenty of freely available Pico footprints on Github such as this https://github.com/ncarandini/KiCad-RP-Pico or https://github.com/MKme/raspberrypi ) and got it made from a three-letter-name PCB company from you know where. The breakout board in the first link has m2 size mounting holes so you can secure it on a larger mounting board or inside a 3d printed case.

FYI until recently this was known as 'rtsp-simple-server', but it outgrew simply being a RTSP server so it was rebranded. It is commonly used in the 3D printing community for serving webcams attached to printers along with ustreamer (https://github.com/pikvm/ustreamer).

uStreamer is far superior to the mjpgstreamer utility that nearly everyone uses. It supports the Pi's OMX media encoder, so you can get reasonable quality with low CPU usage.

I've been in the same situation as you and have been looking into https://github.com/pikvm/ustreamer as an alternative to mpjg-streamer under Raspian Bullseye with the unicam driver and the Media Controller API framework.

Maybe look at https://github.com/pikvm/ustreamer

...the documentation includes an example for the rPi camera as well as simple steps for making it a service.

I've done work before where we stream USB cameras via mjpg using https://github.com/pikvm/ustreamer

Granted this project looks like a lot more streamlined.