Change their values from the current version (e.g., 17.39.4 ) to a newer one like 19.02.3 . and restart your device (SpringBoard). Method 3: The Web Browser Alternative (Easiest)
: If you have never "purchased" YouTube before, log in to your Apple ID on a newer device (iOS 14+) and download it there first. Then, return to your iOS 12 device's "Purchased" list to download the older version. Web Browser Access : If the app fails to load, use youtube.com install youtube ios 1257 exclusive
Even after installing, YouTube often shows a lock screen demanding an update that iOS 12 cannot run. You can bypass this by "spoofing" your app version. Change their values from the current version (e