To stream using an RTMP protocol (services like YouTube, Facebook, and others use RTMP), please do the following.
1. In the top menu bar, select RadioCaster -> Custom Encoders...
2. In the custom encoders window, click the + button to add a new encoder. Set the encoder name, e.g. "ENC1", and click the RTMP button.
3. Input the streaming details: RTMP Output URL and Stream Key - this data is provided by the service you're streaming to.
4. Specify the image or video file to be used as a background.
5. If you haven't yet installed the plugin, click the Install plugin button.
6. Click OK in the RTMP window and then OK in the custom encoders window.
7. In the Broadcast area, add a new streaming encoder (click +).
8. Enter [rtmp] into the Server field.
9. In the Encoder field, select the custom encoder that was created previously e.g., "ENC1".
10. Click OK.
See also Setting up encoders