Designed a real small Camera with fan (30mm).

Took raspian and rtspserver and v4l2 codeparts from the internet and wrote a autostart script (see txt).

You need: 2x M3x10mm Screws for the case 2x M5x25mm Screws + Nuts 2-4x M3x5mm Screws for Raspberry Zero 30mm fan (https://www.amazon.de/gp/product/B07J5C16B9/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1) NoIR Camera: https://de.aliexpress.com/item/5MP-Weitwinkel-Kamera-Nachtsicht-1080-p-Webcam-2-Infrarot-IR-LED-Licht-Mit-16-cm-FCC/32947402966.html Raspberry Pi Zero WH + power adapter + cord (https://shop.pimoroni.de/products/raspberry-pi-zero-wh-with-pre-soldered-header)

For installation: https://github.com/mpromonet/v4l2rtspserver/wiki/Setup-on-Pi