This forces YouTube to generate a new authentication token.
You won't find this on the Google Play Store. To get Smart YouTube TV 6.17.740 on your device: smart youtube tv 617 740
The numbers 617 and 740 are not standard version naming for official releases of Smart YouTube TV.
However, from user reports and forums: This forces YouTube to generate a new authentication token
Unlike smartphones, Smart TVs have very limited storage. Over time, the YouTube app’s cache becomes bloated with old thumbnails and ad data. When the cache corrupts, the video player cannot load the stream, resulting in 617 740. Unlike smartphones, Smart TVs have very limited storage