Do not install 617 or 740 in 2026. Instead, find the latest build of Smart YouTube TV (6.26.x or newer) from a trusted GitHub repository (e.g., yuliskov ). If your TV cannot run that, buy a $20–30 streaming device for a modern ad-free YouTube experience.
Older "Smart TV" platforms (pre-2017) may use outdated versions of the YouTube Leanback interface that no longer support modern pairing tokens. smart youtube tv 617 740 work