YouTube Go: Downloading Videos for Offline Viewing Launched by Google in 2016, it allowed users to download videos directly to their devices or SD cards for offline viewing, providing a solution for those on 2G or 3G networks.
As of , Google officially discontinued YouTube Go . The company cited significant improvements to the main YouTube app, which now performs better on entry-level devices and slower networks while offering a more complete user experience, including features like commenting and dark mode. Why YouTube Go Was Popular YouTube Go - Google Wiki | Fandom