What is the RTSP port to use?

I want to run the feed through a jetson vision program. The program requires this format:
rtsp://username:password@:1234

What is the “1234” port supposed to be?

Looks like 554? From a Reddit post for Wyze and Blue Iris:

nvtowqi0hgu21

Of course this also assumes you have the Wyze experimental RTSP firmware installed.