Once the installation says "Success," unlock your iOS device. Go to Settings > General > Device Management . Tap your Apple ID email and select Trust .
Note: This version may still show a "Tap to Retry" error, which requires a version spoof (see below).
When using a free Apple ID for sideloading through AltStore or Sideloadly, your installed applications expire after 7 days. This is a limitation imposed by Apple's free developer certificate program.
Use search strings like "iOS 10.3.4 YouTube IPA patched" or "Legacy iOS App Archive." 2. Modern Legacy iOS Communities (Reddit)
Search for "iOS 10 IPA collection." Many enthusiasts have uploaded entire libraries of 32-bit apps.
To fix this, you must sideload a modified or older version of the YouTube IPA file. This guide provides the safest methods, necessary files, and installation steps to get YouTube running on your iOS 10.3.4 device. Why the Standard YouTube App Fails on iOS 10.3.4
screens caused by outdated API calls.