How i can monitorize telemetry data from Herelink with udp, without Missonplaner?

I hope I created topic it under the right title and my English is not very good so I apologize. I can monitorize the telemetry data from my plane via Misson Planner, but I want to design my own interface so I have to get the telemetry myself. I am connecting to Herelink Controller with my 5GHz modem at home. I’m trying to get telemetry data with UDP, but it didn’t work. I used the sample code of the library below, but it still didn’t work. I did everything right in the “Video and Data Sharing” section in the Herelink documentation. Any idea where I’m doing wrong?

https://mavlink.io/en/mavgen_python/

I think you don’t need to start a GCS project from scratch… simply pick any GCS like Mission Planner or QGroundControl that supports this very well and modify it for your needs… this way you don’t need to worry about implementing UDP stuff by yourself.