Step 1: Install rtsp on android

RTSP Camera Server

Step 2: Start rtsp stream server

Step 3: download playlist from phone

url for download: http://{phone_ip}/playlist.m3u

Two types of file format
XML: rtsp.xspf

6 Best OBS Plugins for 2024
OBS-RTSPServer

https://www.dev47apps.com/obs/
https://github.com/dev47apps/droidcam-obs-plugin