Hi,
Please have a host PC in Ubuntu 20.04 or 22.04. So that you can install system image and SDK Components through SDKManager. Please check
Download and Run SDK Manager — SDK Manager 2.1.0 documentation
Install Jetson Software with SDK Manager — SDK Manager 2.1.0 documentation
If you can capture the frame date to cv::Mat, you can try cv2.VideoWriter() in the samples to save to a video file or stream out through UDP:
Displaying to the screen with OpenCV and GStreamer - #9 by DaneLLL
Stream processed video with OpenCV on Jetson TX2 - #5 by DaneLLL