He's a University graduate and from what I can gather, living in the UK. In all probability it's a "Piss Take"
I'm not convinced, to me it seems it PROBABLY is a piss take..The chords and harmony are so wrong to the backing, and the whole thing is so bad, YET to play it that way is quite difficult, unless you're tone deaf and musically totally incompetent.
I find it hard to believe that a highly educated young Uni. Grad. has absolutely no musical ear and can't comprehend that the performance is so incorrect..
I don't take prisoners (As you all know) and say it as I see it, in this instance I sincerely believe that it's deliberate. Either way it's insulting to Santo and Johnny and also to the complete Steel Guitar Community.
I'm not setting myself up as an arbiter, others have done that for me.

Age alone is no excuse, I could play better than that at 12 years of age.
I could play most of the steel guitar repertoire by the time I was 16 and don't consider myself exceptional, but do consider him less so.
Just watch how he plays the note on the word "Walk" the VERY same way as Santo, so he's seen the video, ALSO his palm harmonicas are executed SPOT ON..