Connect Jetson Nano to a laptop camera via RTP

Looks like you connect a USB camera to the laptop. Do you run Linux system on the laptop? If you run Linux, you can install gstreamer and try to launch RTSP server through test-launch. May refer to steps in Jetson Nano FAQ
Q: Is there any example of running RTSP streaming?

The nvv4l2h264enc plugin works on Jetson platforms. On the laptop, you can use x264enc like:

$ ./test-launch "videotestsrc ! x264enc ! h264parse ! rtph264pay name=pay0 pt=96"

And then try to receive/decode the stream on Jetson Nano.

If you laptop is Windows system, we don’t have much experience about setting up RTSP server on Windows. Would need other users to share experience.