Open Broadcaster Software
https://obsproject.com/
YouTubeLive簡易コメントビューアー
http://www.kilinbox.net/2016/12/youtubelive.html
棒読みちゃん
http://chi.usamimi.info/Program/Application/BouyomiChan/
APIKeyの説明のやつ
https://developers.google.com/youtube/registering_an_application?hl=ja