What are some alternatives?
When comparing Facebook Live Video and Collages and Doom, you can also consider the following products
Periscope on Twitter for iOS - Stream live video inside your tweets
Quake - Quake is a series of first-person shooter video games released by id Software.
Live Video On Tumblr - Tumblr's answer to Periscope, Facebook Live and Twitch
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Kickflip - add live video broadcasting to any app (iOS / Android SDK)
Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.