OBS Studio: Open-source software for video recording and live streaming
Related: The NDI HX camera app for iOS is currently free (instead of 22€) - with the OBS NDI plugin you can use your iPhone or iPad as a low-latency webcam for OBS.
<a href="https://apps.apple.com/de/app/ndi-hx-camera/id1477266080" rel="nofollow">https://apps.apple.com/de/app/ndi-hx-camera/id1477266080</a>