If you want to stream with OBS to multi-channels, for example, Facebook and YouTube, then you have to install the Multi RTMP plugin.
Process of installing Multi RTMP plugins in OBS
- Make sure you have OBS Studio installed
- Go to OBS Multi RTMP on GitHub repo
- Scroll to the assets section and download obs multi rtmp setup.exe
- After downloading, click the file with .exe extension and install
- Restart OBS (close and open it)
- You should see the option to add multiple streams on the top left corner of OBS
Multi RTMP plugin is only 188 kb and requires 403kb of space to install.