Version 6.1.7.40 is an older version. Smart YouTube TV is developed by independent developers (first by Yuriy L., and later forks by others). Because it is not on the official Google Play Store, you must be careful when downloading APK files.
Some users on fiber optic connections report that IPv6 routing conflicts cause error 740.
Current active version of SmartTube (successor) is v20+ (as of 2026).
Version 6.17.740 is very outdated and may not work properly because YouTube’s API changes frequently. smart youtube tv 617 740
| Aspect | v6.17.740 | Modern SmartTube (v20+) | |--------|------------|--------------------------| | YouTube API compatibility | Broken (likely fails to play many videos) | Fully compatible | | SponsorBlock | Basic | Advanced, with voting | | Return YouTube Dislike | No | Yes | | DeArrow (clickbait titles) | No | Yes | | HDR / AV1 support | No | Yes | | Android TV / Fire OS | Works on old OS | Works up to latest OS |
Do not install 6.17.740 today — it will probably show “error 400” or “video unavailable” on most content. Version 6
Smart YouTube TV is an unofficial, third-party application designed for smart TVs (especially LG webOS and Samsung Tizen models) that cannot run the official YouTube app due to outdated firmware or regional restrictions. It acts as an alternative client to watch YouTube without ads and with additional features like background playback.
It is worth noting that the keyword "smart youtube tv 617 740" is sometimes used incorrectly. If you typed this looking for a specific model number—for example, a Samsung TV model code ending in 617 or 740—please double-check your sticker. No major Smart TV manufacturer uses "617 740" as a model number. Some users on fiber optic connections report that
Alternatively, if you saw this string in a YouTube video title or description, it may be a timestamp (6:17 and 7:40) or a manual activation code for a third-party YouTube client (like SmartTubeNext for Firestick). In that case, treat it as a referral code, not an error.
This solves the problem in roughly 60% of cases.