A YouTube IPA file is an iOS App Store Package used to install the YouTube application on Apple devices like iPhones and iPads. While most users download YouTube through the official App Store, IPA files are commonly used for sideloading—installing apps outside the official store to access modified features or older versions of the app. Modified YouTube IPAs
Because the official YouTube app is restrictive, the community has developed several "plus" versions: uYouPlus (uYou+): Youtube Ipa File
Official App Store install
Smart Audio Mode takes it further: