The following are step-by-step instructions to broadcast from your mobile device. To get started, get out your mobile device and open up the Facebook app. For the purpose a public event, if you have an existing account with a number of followers you should use that account. You will get more reach by doing this. Also, if you pre-arrange to have others share your feed you will similarly increase your reach.
Step 1: Go to your own Facebook profile and open up the status bar as if you're going to write a new post.
Step 2: Tap the "Live" icon, which looks like a video camera and says ’Live’. You will see a screen similar to this one.
Step 3: Choose your privacy setting. It will say ‘Only me’ as a default.
If you're posting for your event you'll want to make it public. But if you're new to Facebook Live and want to test it out first, or want to see what something will look like, then switch the privacy setting to "Only Me." You can find the "Only Me" option by clicking "More" and scrolling all the way to the bottom.
Step 4: Write a description of your video.
Give your broadcast a description, which will show up on people's News Feeds like a status update above the video. To get people to tune in, write an attention-grabbing headline and help them understand what your broadcast is about.
Step 5: Set up your camera view.
Before you click "Go Live," be sure your camera's pointing in the direction you want it to. The background on the setup screen will show you what your camera will see. You can see in the screenshot my computer was the background. If you want to change the camera view to ‘selfie’ or forward facing, simply click the rotating arrows icon in the upper right-hand corner of your screen. You can also do this while you are broadcasting.
Note: The video will be a square, so it doesn't matter whether you hold your mobile device vertically or horizontally.
Step 6: Click the blue "Go Live" button to start broadcasting.
Once you click it, Facebook will give you a countdown -- "3, 2, 1 ..." -- and then you go live. As soon as you start streaming, your live video will appear in your News Feed -- and others News Feeds -- just like any other post.
Your broadcast can be up to 90 minutes long. Keep in mind that the longer you broadcast, the more people who are scrolling through their News Feeds on Facebook will stumble upon your post.
Step 7: Interact with viewers and commenters.
To keep your viewers engaged, encourage them to interact with your live video (which will help your ranking in others' News Feeds). The more you recognize that you have viewers the longer they will stay. You can interact with them both by speaking directly at them in your video and, if you want, by having someone else respond to comments from a desktop computer elsewhere.
Where can you see these comments? While you're broadcasting, you'll see the time elapsed on the top left along with the number of viewers, and comments will show up live on the bottom of your feed. They'll appear in reverse chronological order, like on Twitter, so keep in mind that the earlier ones may be farther down.
(Note: You can also block viewers during a live broadcast by tapping the profile picture next to a viewer's comment and then tapping "Block." )
Step 8: Click "Finish" to end the broadcast.
Once you do this, the video will stay on your Timeline or Page like any other video post.
Step 9: Save the video to your camera roll.
Once you finish your broadcast, you'll be met with a screen similar to the one I've screenshotted below. Be sure to toggle the option to save the video to your camera roll so you have a copy of the original for safekeeping.
Step 10: You're done!
You can always go back to the post on your Timeline or Page and edit the description, change the privacy settings, or delete the video, just like you would any other post.