Thanks for reaching out. Although YouTube Gaming isn't available anymore – we want to give our gaming creators the biggest possible audience they can have, so we launched http://youtube.com/gaming on YouTube where 200M+ people enjoy gaming content every day. Hope this helps.
While you need at least 1,000 subscribers to be able to stream on mobile, you should still be able to stream through desktop and webcam with less than 1,000 subs. More info here: https://yt.be/help/jLyp . Hope this helps clarify.