"The current version requires iOS 14.0 or later, but you can download the last compatible version." Apple Support Community 2. Use the "Family Sharing" or "Secondary Device" Trick
Which of those would you like next?
If you never downloaded YouTube 1257 before, you can manually sideload the .ipa file (iOS app package). This requires a computer. install youtube ios 1257
. This creates a shortcut that works almost exactly like the app. Third-party Browsers : Browsers like "The current version requires iOS 14