Find the keys CFBundleShortVersionString and CFBundleVersion .
This article breaks down everything you need to know.
Drag the IPA into Sideloadly, enter your Apple ID, and hit "Start."
This is the most common "repack" technique. It doesn't require a special IPA; instead, you modify the last compatible official version to trick YouTube's servers into thinking you're on a newer version.
: On your iOS 9.3.5 device, go to App Store > Purchased . Locate YouTube and tap the Cloud icon .
Most older devices are "stuck" on iOS 9.3.5, and attempting to download YouTube from the App Store often results in an "Unable to Purchase" or "Not Compatible" error. Even if you manage to install an older version, you may encounter an "Update Required" prompt that prevents you from watching videos. 2. Method 1: Installing a Pre-Patched (Repack) IPA
A "repack" IPA is a modified version of the YouTube app that has been adjusted to bypass version checks.