I got the RTSP video stream on the jetson nano and ran it for about 50 frames before returning false

Hi,
cv2.VideoCapture(rtsp_url) does not utilize hardware decoding. We suggest use gstreamer. Please try

$ gst-launch-1.0 uridecodebin uri=rtsp://freja.hiof.no:1935/rtplive/_definst_/hessdalen02.stream ! nvoverlaysink

And replace with your URI.