If you sideload using a free Apple Developer account, your certificate expires every 7 days. You must re-sign the IPA via your computer or AltStore weekly. Paid developer accounts ($99/year) allow 1-year signing.
If you're looking for a YouTube IPA (iOS App Store Package) version 12.11.6, it's essential to understand that sideloading apps or using modified versions can pose security risks and may violate terms of service. However, I can guide you on how to approach this situation safely and within the bounds of legal and ethical considerations. youtube 12.11.6 ipa