Putting aside being diabetic for a moment...
I like a nice Forêt Noire gateau
I like a Victoria Sponge cake
I like chocolate éclairs
I like jelly and trifle
I'm less fond of a Forêt Noire, layered with a Victoria Sponge, stuffed with chocolate éclairs and topped with jelly and trifle. That's what I made of the BBC video, a rich series of elaborate compositions each vying for a place in a sonic sphere already pretty full. Yes, the bloke is multi-talented, and has a lot going for him, for which I would think he's worked darned hard; chapeau bas for that. Taken individually, in smallish doses, I can appreciate a lot of it, and even enjoy some, but in such a massive dose, I had to turn it off half-way through. I might go back to listen to a bit more in, say, five-minute sections, or however long the pieces might last, but then I'd let that settle on the stomach for a day or so before going back for another dose.
I would recommend, on a technical note, that he carries on with, or takes up, proper singing lessons from a good coach, as he definitely has the vocal capacity for doing some great stuff, but it's a bit more than 'hit'n'miss' to be comfortable. Trained to the same high standard as opera, lyric singers, he'd be a good deal more 'musical', I'd say.
In short, I'd suggest that the fellow is a living proof of the old adage: less is more. I found the quality and professionalism of the orchestra to be of great help in getting as much as I did from what I heard, and will likely go back for more, but not right now. [Burp ...]