https://tylermichael.github.io/twitch-player/
git clone https://github.com/tylermichael/twitch-player.git
cd twitch-player
npm install # or yarn install
npm start # or yarnpkg start
A browser window should open automatically.
You will also need to create a twitch application and use your API token to authenticate with here: https://www.twitch.tv/kraken/oauth2/clients/new