What does that title mean? you might ask.
Well, take the normal upper High Definition of 1,920 x 1,080 pixels and double it – both ways, horizontal and vertical. That gives you 3,840 (nearly four thousand, hence the '4k' shorthand for this) pixels horizontally by 2,160 vertically – four times the number of 'dots' that make up the image.
This is also known as Ultra High Definition (UHD), and this visually stunning video was matered in that resolution. Here, it is at the usual 560 x 315 pixels that best fits this 'blog; but if you click the Quality (cogs icon) on the player (shown only when the player is active) the 'original' resolution is available, along with various others.
Of course, you'll need a suitable monitor to gain the full benefit of the UHD option; but there is something extra about even the 'normal' HD displays. The Miku model is an XS by someone known simply as mqdl, and it is very special for what is, after all, just the standard spec as far as hair and costume are concerned. It genuinely is quite something, although personally I am not a hundred percent happy with her mouth – but perhaps I'm just an old fuss-pot!
The song is called Leaping from Zero to Eternity, and when they are available in English the lyrics will apparently tell us something of Miku's "little genesis". I shall be looking out for those to appear...