Devices like the iPhone 6 and iPad Mini 3 are hardware-limited to iOS 12.5.7 and cannot update to iOS 13 or later.
Some users find relief by going to Settings > General > iPhone Storage , selecting YouTube, and choosing "Offload App" (this keeps your data but deletes the app binary), then reinstalling it from the "Purchased" section as described above. youtube download ios 1257 verified
While you can still get the app running, there are growing pains: Devices like the iPhone 6 and iPad Mini
"Well, it's too much to lose\Oh, it's time, or self-destruct\They don't care what the science says/They don't want to talk"