For a device stuck on iOS 9.3.5, jailbreaking is the most effective method, as it allows you to trick the server or modify the app files on the device.
Installing the YouTube app on iOS 9.3.5 is challenging because official support ended years ago. However, you can still get it working by downloading the (v13.42.6) through your account's purchase history or by using community-developed fixes like TubeRepair for jailbroken devices. 1. Downloading the Last Compatible Version (No Jailbreak) youtube ipa file for ios 9.3.5
This is the most stable method, as it signs the app with your own Apple ID. For a device stuck on iOS 9
Disclaimer: This article is for educational purposes. Downloading and sideloading modified IPA files violates Google’s Terms of Service and Apple’s end-user license agreement. Proceed at your own risk. jailbreaking is the most effective method
