To sync your subscriptions, click the option, note the code on your screen, and enter it at ://youtube.com using a smartphone or computer. System Requirements & Compatibility Minimum Requirement Recommended OS Version Android 4.4 (KitKat) Android 7.0 or higher RAM Architecture ARM, ARM64, x86 Storage 30 MB free space 100 MB free space Important Notice: The Legacy Status of Smart YouTube TV
It’s often helpful to mention that this is a third-party client and requires "Sideloading" to be enabled on their device.