Use OBS, FFmpeg, or any RTMP-compatible software to stream:
Server: rtmp://livega1.online:1935/live
Stream Key: your-stream-key
Watch URL: https://livega1.online
Example FFmpeg:
ffmpeg -re -i video.mp4 -c:v libx264 -preset veryfast -tune zerolatency -c:a aac -f flv rtmp://livega1.online:1935/live/test