Find the keys named and CFBundleVersion .

Subreddits like r/LegacyiOS or r/jailbreak maintain curated spreadsheets of working IPAs for iOS 9.

: Disables the OS version check in the App Store, making it easier to trigger the "Last Compatible" download. 4. The Browser Alternative (No Jailbreak)

Once installed, the app icon will appear on your home screen, but it won't open yet. On your iOS device, go to Settings > General > Device Management / Profiles . Find your Apple ID email, tap it, and select Trust .

If sideloading an IPA proves too difficult, you can still watch YouTube on your device using these alternative methods:

Find the keys CFBundleShortVersionString and CFBundleVersion .

Follow these steps carefully:

After the jailbreak, you can install the necessary file manager and tweaks from Cydia.

If Safari feels sluggish on your older device, try a lightweight browser like Brave (if a compatible version exists) or Dolphin . However, for maximum compatibility, Safari on iOS 9.3.5 remains the safest choice because it is still maintained by Apple for that OS version.

These modified clients are excellent choices because they are actively updated and circumvent the YouTube version‑check entirely.

/var/containers/Bundle/Application/YouTube/YouTube.app/Info.plist CFBundleShortVersionString CFBundleVersion Change their values to a more modern version like

Locate CFBundleShortVersionString and CFBundleVersion and update their values to a recent YouTube version number.

An iPad 2 or iPhone 4S only possesses 512MB of RAM. Do not expect to stream 1080p or 60FPS video smoothly. Stick to 360p or 480p settings for a buffer-free viewing experience.