I watched the video and then listened to the backing track before looking at the lyrics. I actually think that as an anthem, with a strong choir, it's very sing-a-long-able. Presume this is the intention - street parties, youth club choirs, school choirs etc., The music is surprisingly appealing and for a celebration would pass the Old Grey Whistle Test.
The video, however, is not and some of the lyrics are really quite naff; with some lines like they've been borrowed straight from a Hallmark card - and I think that will put a lot of people off.
Can You Name 5 More Songs? (number 2)
Lack of public toilets in towns.
The King is to resume some duties.