Youtube For Android 4.1 2: Uptodown [upd]

: While becoming harder to find, this "official lite" version was designed for older hardware and slow connections, allowing you to download videos for offline viewing to save data. NewPipe Legacy

Uptodown is a popular third-party app store that maintains an archive of older APK versions, allowing you to "roll back" to a version compatible with your device [11]. youtube for android 4.1 2 uptodown