It seems you're looking for the SmartTube APK (often mistakenly called "Smart YouTube TV"), specifically an older version or a build number that includes 617740 and is considered "hot" or recently requested.

Step 2: Download the APK

• Open a browser or the Downloader app.
• Navigate to the official GitHub repository (Search "yuliskov/SmartTubeNext" on GitHub).
• Look for the release labeled beta or stable with the number 617740.
• Download the file ending in .apk (arm64-v8a for most modern devices; armeabi-v7a for older Firesticks).

4.3 Background Playback

Unlike many official TV apps, this build allows audio to continue playing even if the user navigates away from the app (depending on device RAM management), functioning similarly to YouTube Music.

Smart YouTube TV is a third-party, open-source YouTube client specifically designed for Android-based smart TVs and set-top boxes. It serves as an alternative to the official YouTube app, particularly for devices that lack Google Play Services or require a more remote-friendly interface. Key Features of Smart YouTube TV