Streaming to Facebook Live can be done by using a Facebook persistent RTMP Stream Key.
Setting the RTMP destination is done via the Loola settings page:
https://app.loola.tv/configure-platforms
Steps:
1. Open https://www.facebook.com/live/create
2. Select "Create Live Stream"

3. Select "Use Stream Key":

4. Mark "use persistent stream key":

5. Copy the Stream Key and paste in Loola:


Click Connect to save your Persistent RTMP Key in Loola.
6. Set your stream destination and privacy on Facebook:

7. Select Privacy, Title and optional description:

Note: at this time, Loola won't show chat comments from Facebook Live viewers in the Loola studio.