How do you transmit video stream?

I want to add live video stream from my drone over internet using companion computer.
Explain please how do you do it? What equipment (except camera and 4g modem) do you use, what software?

Currently I have RPI 3B+ as CC and HQ camera for it. I don’t understand how to stream video from it.
Any ideas?

You could use gstreamer

Aha, thank you.

Gstreamer is the best option?

Maybe. I don’t know of any other as ffserver was discontinued.

If you were to stream over WiFi then openHD is your best choice.

Looked into code of OHD. It uses in bach script gstreamer.