Most Android TVs still run on 2GB of RAM. Versions after 620 introduced a background pre-caching feature for "Up Next" videos. While noble, this feature destroys background processes. In 617.391, the app uses a passive fetch system. You lose the "instant" next video load, but you gain stability. The app never crashes when returning from sleep mode.
Smart YouTube TV version is a legacy, optimized YouTube client designed specifically for older Android Smart TVs smart youtube tv 617 391 better