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iPhone 6 Plus, iOS 12
iPhone 6 Plus, iOS 12
An iPhone 6 Plus cannot update past iOS 12. If you need a newer iOS version, you will need a newer phone.
An iPhone 6 Plus isn't capable of 13 or above. Try downloading the application to a newer unit on the same Apple ID first.
(243270)
App Developers choose what the minimum version of iOS to support. In your case the developer of the app has chosen iOS 14 to be the minimum version to support. That is why you are unable to download or use it.
Use the YouTube website until you can acquire a newer (used, refurb) or new iPhone, and can retire this iPhone 6.
What is your question?
The message is clear. The app requires a version of iOS that your phone can not run.
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