Possibly, but only if it’s Android TV 5.0+. On older Samsung/LG, you cannot install arbitrary versions. The official built-in YouTube app may already be the only compatible one.
LG blocks side-loading entirely. The only safe way to get the latest YouTube is: Possibly, but only if it’s Android TV 5
Any link promising “617.391 download for LG webOS” is either a scam or requires developer mode hacks that void your warranty. Any link promising “617
Use a Trusted APK Repository
Download via Downloader App
⚠️ Important Notice: Before downloading, please ensure that your Smart TV runs on the Android TV operating system (e.g., Sony, Philips, TCL, Hisense, or Nvidia Shield). This APK file is not compatible with Tizen (Samsung) or WebOS (LG). Use a Trusted APK Repository
To install this manually, you will need to enable "Install from Unknown Sources" in your TV's security settings and use a tool like "Send Files to TV" or a USB drive to transfer the file.