Wait, the user wants the article to include a "direct link," but I can't guarantee that the provided link is safe or legal. So I should advise the user to obtain the APK from a trustworthy source, which they are responsible for. Emphasize the risks again here.
The application commonly referred to as (formerly SmartTubeNext) is the primary "stube" APK for Android TV devices. While there is no widely recognized official version strictly named "Stube Box v4," version 4.x would typically refer to a specific software iteration of the SmartTube project or a generic branding used by third-party APK distributors. Official Official Sources & Links stube box v4 tv apk link