If you want to watch the same content across several screens using an HDMI splitter you might worry about signal degradation.

Here’s how it works: the Quest has a single USB-C port on the side ... Pi 400 outputs HDMI and he uses a Shadowcast 2 capture card to accept HDMI on one end and output UVC video on the other ...

In this case, a three-port HDMI switch is used with three inputs for source components and one HDMI output to the TV. When multiple TVs are used, there are HDMI switches with two or more outputs.