Yes, the watch can operate independently. Even when your iPhone isn't nearby, you can access all features as long as your watch has WiFi or cellular connectivity.
Some age-restricted videos require sign-in to play, and certain videos may fail due to copyright restrictions in your region.
This app does not collect any account information, viewing history, video data, or usage records. Your watch history is stored locally only, nothing syncs to remote servers. All requests use YouTube's official APIs directly without accessing any private data.
Current features include: Browse trending videos, home feed videos; Search videos, channels, and playlists; View detailed information for videos, channels, and playlists; Read all video comments; Access your last 50 watch history entries; Full player controls: seek, playback speed, volume, background playback. Additional features when signed in: View all your subscribed channels; Access your playlists; Browse your liked videos;
You can click the "Sign in" button on iPhone YTWatch app, finish all the sign in steps offered by Google, and apple watch client app will sync the account info automatically