How I turned my old Android phone into a streaming stick for free - in 6 easy steps

How I turned my old Android phone into a streaming stick for free - in 6 easy steps ...
Ars Technica

Android to HDMI - why isn't it mirrored, and how can I use this?

I connected my Samsung S9 to a projector today (USB-C to HDMI dongle), and I expected to see my phone screen, or at least the same thing on both screens. What happened instead is my phone screen looks ...