If you use a "signing service" (not AltStore) to install your YouTube IPA, Apple can revoke the enterprise certificate used to sign it. When that happens, the app crashes on launch, and you lose your downloaded videos and playlists permanently.
The archive is not hosted in one single place; it is distributed across various archival platforms and community repositories. Youtube Ipa Archive
An archive tells a story of technological shift. Looking through a YouTube IPA archive reveals three distinct eras of the platform on mobile: The Built-in Era (iOS 1 to iOS 5) If you use a "signing service" (not AltStore)
Check the Internet Archive (Archive.org) for official versions ranging from the earliest builds to recent 2024/2025 releases. An archive tells a story of technological shift
Official YouTube updates every two weeks to patch security holes. The IPA you archive today might have a WebKit vulnerability from six months ago. By using an old, modified IPA, you are exposing your device to potential RCE (Remote Code Execution) attacks via video comments.
Open AltStore, navigate to the "My Apps" tab, and tap the icon.