The Chromecast Ultra has a clever fix for massive 4K video streams

What can you say about a Chromecast — specifically the new Chromecast Ultra? Like the one that came before it, it’s a circular disc with a tiny HDMI cable sticking out of it. Like all Chromecasts, it streams video directly from the internet, but you choose what video to stream using your phone (or maybe the new Google Home speaker, if you have one). It is, in short, just a Chromecast. I held one: it felt like a Chromecast.
The “Ultra” part of this Chromecast is that it su