Even if you successfully install the YouTube IPA, you will likely see an "Error Loading" screen. This is because the app is trying to talk to a dead server.
To overcome this, the jailbreak community developed a workaround that forces old software to communicate with modern servers using a custom API proxy. Prerequisites Before You Begin youtube ipa for ios 511
Ensure your jailbroken device has installed via Cydia. Drag the YouTube IPA file into your iTunes App Library. Sync your device to automatically install the app. Step 3: Bypassing the "Loading Error" (The API Fix) Even if you successfully install the YouTube IPA,
Enter your Apple ID credentials (this is required to sign the app, though AppSync will assist on the device side). Click and wait for the "Success" notification. Method 2: Legacy iTunes (Version 12.6.5 or Older) Prerequisites Before You Begin Ensure your jailbroken device