This is where the "deep piece" gets interesting. Developers on XDA-Developers and 4chan’s /g/ board have created that run on 4.4.2.

In the Android 4.4.2 source code (branch klp-dev ), there is a commented-out test function called testYouTubeLeanbackIntent . That function contains a hardcoded video ID: dQw4w9WgXcQ . Rickrolling was built into the KitKat framework. Some things never change.

If you side-load YouTube 10.14.56 onto a clean 4.4.2 device today (e.g., a Nexus 7 2013 or a Galaxy S4):

This is often the for Android 4.4.2 users today. Independent developers have created lightweight YouTube clients that are superior to the official legacy app.