Well, the video is cranky and unclear but apparently its pretty long, wavy from side to side AND up and down so its very strange.

It wasn't disvovered early enough - so does that mean lots of stuff isn't found early enough, on account of the level of investigation is limited? 'Spose so. Its a money thing.

So it sits there for 3,000 years. Then its found. So the great unwashed get a fleeting chance of a quick Saturday afternoon look, except they don't, but they might get a weekday if they're lucky. Then its covered up again for another few hundred years as access to an industrial estate is urgently required. And it doesn't matter how important or unique it is.