I know now why it does work with OpenSUSE but not with Debian:
GStreamer is compiled without libv4l2 code by default. Something that could be changed easily: https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/644
I know now why it does work with OpenSUSE but not with Debian:
GStreamer is compiled without libv4l2 code by default. Something that could be changed easily: https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/644