However, there is a workaround. Here is my review of the process and the result of getting YouTube installed on this older firmware. Installing modern apps on iOS 12 is not straightforward, but it isn't impossible either. You cannot just search for YouTube in the App Store, as Apple only offers the latest version (which requires iOS 14+). Filmyzilla Paul — 2011 Exclusive
If you are holding onto an iPhone 5s, 6, or 6 Plus running iOS 12.5.7, you know the struggle of the "This application requires iOS 13.0 or later" error message. YouTube is the lifeblood of the internet for many, and being locked out of the App Store version turns a perfectly functional phone into a paperweight. Scaramouche X Debate Club Image - 3.79.94.248
If you need a dedicated media player for a car or a child's device running iOS 12, this installation method is perfect. Just be prepared to troubleshoot the occasional login error.
iPhone 6 iOS Version: 12.5.7 Method: App Store "Purchase" History
However, the experience is fragile. Living on an outdated app version means you are at the mercy of Google’s server-side updates. It works today, but it might be broken tomorrow.
Go to App Store > Profile > Purchased > YouTube > Download. Accept the prompt for the "older version."