Unlike the mobile YouTube app, SmartTube is designed to be navigated with a remote or a D-pad.
. While it will run on tablets or phones with 4.4.2, the interface is designed for remote control navigation rather than touchscreens. Installation Guide smart tube apk android 4.4 2
Android 4.4.2 devices typically have limited RAM (512MB–1.5GB). To prevent stuttering: Unlike the mobile YouTube app, SmartTube is designed
If you cannot get a stable build, try these alternatives tailored for KitKat: Unlike the mobile YouTube app