That’s a function of the app though. The YouTube app is catching the URL intent but on Android you can tell Android to open an app even if the app isn’t looking for special URLs etc.
That said, the post was about opening YouTube on iPhone with an NFC tag … so yeah it’s another way of making it work.
The bummer is that there is no universal way to make it work on both so you have to literally have two NFC tags where one says iPhone users tap there and Android users tap here… Ugh