Hi,
Looks like it only shows MJPEG on Jetson Nano. Please try gstreamer pipeline and check if you can see view preview:
$ export DISPLAY=:0
$ gst-launch-1.0 v4l2src ! image/jpeg,width=640,height=480,framerate=30/1 ! jpegparse ! jpegdec ! videoconvert ! xvimagesink
And USBCamera should work with YUV422 format such as YUYV or UYVY. If the camera dies not show YUYV on Jetson Nano, probably certain driver is missing. It looks to be about USB ACM. May try this:
Xavier NX not recognizing certain ACM USB device - #8 by DaneLLL