You can find these archived versions on APKMirror or Uptodown . 2. Third-Party Clients (Recommended)
Some devices may have this option under Settings > Apps > Special access > Install unknown apps . youtube android 6 apk
For a standard, safe, working YouTube experience on Android 6: You can find these archived versions on APKMirror
Even if you successfully side-load a working YouTube APK on Android 6.0, the experience is diminished. You will likely miss out on: Special access >
If you absolutely must run the native YouTube app on Android 6.0, you have to step outside the Google Play Store. This involves side-loading an APK (Android Package Kit). However, this comes with significant caveats regarding security and functionality.