As promised...The tune sounds quite familiar, but I just can't 'imagine' where I've heard it before.
Sorry, but when I tried to play this song on Fr Blake's website I could not understand a word because of the bad enunciation of the singer. Inaudible! I thought it was rot. Having read the words via Rorate Caeli's link I wish they had not been set to 'music' but left as they were. The appearance of the singer also irritated me.
That's the price of fame in the traditional Catholic World's new media. They build you up only to knock you down. I'm getting an injunction out on this Beryl character!