https://www.xfinity.com/support/articles/cast-xfinity-stream-to-chromecast https://www.xfinity.com/support/articles/activating-xfinity-stream-smarttvs https://www.xfinity.com/support/articles/xfinity-tv-app-requirements https://www.xfinity.com/support/articles/xfinity-tv-website-requirements