The Play Store is not a single app. You need four specific legacy APKs. Do not download the latest versions; download version 4.x era files from reputable archives (like APKMirror).

While it is technically possible to side-load a crumbling version of the Play Store onto KitKat, the experience is laggy, insecure, and missing 99% of modern streaming apps. You are better off using your old Android TV box as an offline media player (using Kodi 17.6 or VLC) or recycling it.

While the heavy hitters might be gone, several essential tools still run well on KitKat: