Look for YouTube version 15.x or 16.x, which were the last to support iOS 12. Use reputable community archives like r/LegacyJailbreak or Archive.org .
Many older YouTube versions show an "Update Required" pop-up that cannot be dismissed; sideloaded IPAs can often bypass this. Popular Sideloading Options youtube ipa for ios 12.5.6
If you are jailbroken, you can use a tweak like DisableYouTubeUpdate or AppAdmin to bypass version checks or spoof your app version to "17.xx.x" to trick the servers. Summary of Options Ease of Use Reliability App Store (Purchased) Moderate (may still hit "Update" error) Safari (Mobile Web) Highest (no errors) Side-loading IPA High (if using a stable archive) Jailbreak Tweaks High (requires technical setup) If you'd like, I can help you find: Instructions for jailbreaking iOS 12.5.6 How to spoof your app version using a file manager Look for YouTube version 15
Understanding the “why” helps you fix the “how.” YouTube’s parent company, Google, updates its backend API (Application Programming Interface) approximately every 8 weeks. The modern YouTube app (version 19+) relies on iOS 14 or iOS 15 frameworks. Popular Sideloading Options If you are jailbroken, you
💡 Downloading IPAs from unofficial sources carries risks. Always use reputable community repositories like GitHub or the Internet Archive . ios-ipa-collection directory listing - Internet Archive
Use the web version: