How to use your Chromecast without a Wi-Fi connection, and cast all of your favorite content even without internet

Fi, and still stream all of your favorite content to your TV from another device.
9to5google

Google removes Chromecast Guest mode that didn’t need Wi-Fi

Back in 2014, Google added a guest mode feature to Chromecast that lets other people Cast to your TV without having to be on your Wi-Fi network. This feature is now being removed. This feature was ...
Ars Technica

Do Chromecast devices still temporarily kill wifi networks?

Background: I have an original 2.4 GHz-only Chromecast (which I got bundled in with my now defunct Nexus 7 a long time ago), and I remember reading over a year ago that the Chromecast was doing ...