Smart YouTube TV version 6.17.391 is a legacy third-party YouTube client primarily used on Android-based smart TVs and TV boxes that lack official Google Play Services. While this specific build was released in June 2020, it remains a popular choice for older hardware running Android 4.0 or higher. Review: Smart YouTube TV (v6.17.391)
Alternatively, search for "YouTube" directly in the store to see the current version status. Samsung Smart TVs (Tizen OS) Press the Home button on your remote. Navigate to "Apps." Select the Settings icon (gear) in the top right. Locate the YouTube app. Smart YouTube TV version 6
Independence: A major highlight is its ability to run without Google Services, making it ideal for budget TV boxes or regions where official apps are restricted. Restart your TV: Sometimes, simply restarting your TV
Customizable Multiview: You can now watch up to four different channels at once, mixing sports, news, and entertainment in a layout of your choice. Restart your TV: Sometimes
Smart YouTube TV 6.17.391 (noarch) (Android 4.0+) - APKMirror
If an update is available, select Update. If not, and your version matches 617 391, you are already current.
Verdict: 617 391 is NOT an official Google release. It is a community-driven enhancement.