For those unfamiliar with the term, an IPA file is a file format used by iOS devices to distribute and install applications, including games and software. Typically, IPA files are encrypted and can only be installed on an iOS device through the App Store. However, decrypted IPA files are different. These files have been modified to bypass Apple's encryption, allowing users to install and run them on their iOS devices without the need for the App Store.
Technical points to understand
Because these IPAs are unsigned and un-sandboxed (when combined with TrollStore or jailbreaks), they have access to: youtube decrypted ipa