This is the core problem for iOS 12.5.7, but as you'll see below, a provides the key to bypass this restriction and even enable downloading.
You must have previously "purchased" (downloaded) YouTube on your Apple ID. Step-by-Step: Open the App Store on your iOS 12.5.7 device. Tap your Profile Icon in the top right corner. Select Purchased (or "My Purchases"). Search for "YouTube" in the list. Tap the Cloud Icon next to it. download youtube ios 1257 top
Before downloading any YouTube videos, it is important to understand the legal and security implications. According to Google's Terms of Service, downloading content from YouTube is generally not permitted unless a download link is explicitly provided by YouTube for that specific content. Violating YouTube's Terms of Service could lead to the termination of your account, especially if you are identified as a repeat infringer. This is the core problem for iOS 12