If you have previously downloaded YouTube on your Apple ID account, you might still be able to get a compatible version directly from Apple. on your iOS 10 device. Go to Purchased or search for "YouTube." Tap the Cloud icon to download.
Technical Guide: Installing YouTube on iOS 10.3.4 On legacy devices like the iPhone 5 or iPad 4 running iOS 10.3.4, the official YouTube app often displays a "Loading... Tap to Retry" error or may not be downloadable from the App Store. This guide details how to source and install a compatible 1. Locating a Compatible YouTube IPA download youtube ipa file for ios 10.3.4