If your iOS version is compatible (14.0 – 17.0), TrollStore is the gold standard. It bypasses signature expiration entirely, meaning you never need to "re-sign" the app every 7 days. You simply download the IPA, open it with TrollStore, and tap install. It is widely verified as the safest and most convenient method for compatible devices.

: Never log into a modified YouTube IPA with your primary Google account.

While searching for might seem like a quick fix to get your preferred video layout or features, downloading files from unverified third-party indexers poses severe security risks to your device.

He navigated to the Info.plist file. <key>CFBundleShortVersionString</key> <string>15.02.1</string>

: Using modified versions of YouTube violates YouTube's Terms of Service, which can potentially lead to your Google account being flagged or restricted.

It may refer to an older version build of the YouTube app (Version 15.02.1), which dates back several years. Users often seek out legacy versions because they run lighter on older hardware, or because they are compatible with older iOS versions (like iOS 12, 13, or 14).

, many users now report that these older versions face "Something went wrong" or playback errors due to server-side changes by YouTube. Current Sideloading Landscape

SHA-256: 9f86d081884c7d659a2feaa0c55ad015...

Do you have access to a for installation?

I can recommend the safest, most stable method tailored to your specific device. Share public link

: Often cited as a stable choice for no ads and PiP, frequently installed via tools like Sideloadly YouTube OLED

Ensures the app can be resigned and installed via AltStore or Sideloadly.

: Using third-party clients violates YouTube's Terms of Service, which may lead to your account being permanently banned. App Instability

An IPA (.ipa) file is the standard archive format used to package iOS applications. Unlike the sandboxed and strictly audited environment of the official Apple App Store, third-party IPA files downloaded from public forums, file-sharing sites, or unverified repositories carry inherent dangers. Malicious Code Injection

: Do not download IPAs from sites that require you to "verify" your device by downloading other apps or completing surveys.

: Check community forums like Reddit's r/sideloaded to see if the specific source for "YouTube 15021" is trusted by other users. Conclusion

Knowing these details will allow me to recommend the exact, safest tool and project repository for your setup. Share public link

If you choose to experiment with sideloading, you must never install an IPA file blindly. Verifying the source and structure of the file is a critical line of defense against malware. 1. Analyze File Hashes