A message of unity set on the darkest of stages 100 years in the past. As a thirty-something American, I see nothing wrong with this. Anytime we can break down the barriers that separate peoples to show that we're all driven by the same basic desires, (in this case, food and a longing for family) it can only be considered a positive message.
Now, as far as relaying a product or brand, way to miss the target, Sainsbury's! As a commercial, it reminded me of those jean or perfume ads from the '90's where there were lots of images, music, inane chatter, and suddenly at the end a brand name and product would pop up. This one took it a bit further though. I had to google just what Sainsbury's is, and frankly, I fail to see what they have to do with trench warfare or impromptu international rugby matches.
Still, this was neat to watch, and far more entertaining than the multitude of drivel that US television bombards us with.