Remote control?

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Seems like any HID compatible with your Chromebook would work. Take your pick -- wireless KB, mouse, combo (https://www.logitech.com/en-us/products/...07119.html), a gaming controller would probably work, even an actual remote control with bluetooth capability would probably function.

I'm not aware of "second-screen" type capability though, which might be what you're hinting at. This seems like more of an Occam's Razor situation, though. Find the right peripheral, which probably already exists in your home.