: If you cannot download it directly, use a newer device with your Apple ID to "purchase" YouTube, then download the "last compatible version" from your history on the old device.
: For modern devices (iOS 14+), users often prefer tweaked IPAs like YTLitePlus YouTubeEnhanced which include ad-blocking and background play. Critical Limitations Sign-in Issues
: It is one of the last stable versions that functions on iOS 9 and iOS 10. Performance
