Installing the official YouTube app on iOS 12.5.7 can be tricky because the latest version typically requires iOS 16.0 or later . However, you can still get it working by downloading the last compatible version or using a mobile browser. Option 1: Download via "Purchased" (Best for Older Devices)

Storage: Ensure you have at least 200MB of free space, as older versions still require local storage to install .

  • GET /v1/apps/appId/releases/releaseId/manifest (protected) → serves signed manifest.plist
  • POST /v1/mdm/install-requests

    "Purchase" (download) YouTube there so it is linked to your account.