Because this is not on the Play Store, you must sideload the APK. Below is a step-by-step guide for Android TV, Google TV, and Fire OS.
Device Compatibility: It runs smoothly on older Android 4.4+ hardware. Smart Youtube Tv 6.17.724 Apk
If 6.17.724 stops working tomorrow (Google changes APIs often), you should immediately search for (current versions are in the 19.x or 20.x range). The developers migrated all features—plus new ones like Android Auto support—to SmartTubeNext. Because this is not on the Play Store,
Call of Duty: Black Ops Zombies APK for Android
