Select to install the last compatible version for iOS 10. Method 2: Sideloading a Modified IPA (Best Functionality)
: You can find archived versions, such as YouTube v12.11.6 or specialized patched versions, on community-trusted sites like Archive.org . Install via Sideloadly or Cydia Impactor : Connect your device to a computer. Open Sideloadly or Cydia Impactor . Drag the downloaded YouTube .ipa file into the tool. download youtube ipa file for ios 10.3.4
If you successfully install a YouTube IPA compatible with iOS 10.3.4, here is the experience you should expect: Select to install the last compatible version for iOS 10