You cannot directly download and install an older version of the YouTube app on an iPad the way you can on an Android phone (by sideloading an APK). Apple’s iOS/iPadOS ecosystem is "walled garden"—every app must be installed through the official App Store, which only serves the latest version compatible with your iPad’s operating system.
Don’t waste hours searching for "old YouTube IPA" or third-party installers claiming to give you older versions. On a non-jailbroken iPad, it’s not possible in a usable way. Use the web browser method – it’s simpler, safer, and actually works long-term.
However, there are that sometimes work, but they come with major caveats. Method 1: The "Purchased" App Loophole (Most Likely to Work) If you (or a family member) downloaded that specific older version of YouTube on your Apple ID before , you may be able to re-download an older compatible version.