I finally managed to download the video properly from TEPCO's Photos and Videos Library page.
For more about TEPCO's latest attempts to probe the Reactor 2 CV, see my posts, here and here.
By the way, I happened to watch a BBC news clip August 6, 2013 on Fukushima I Nuke Plant, and saw in amusement the snippet of the video inside the Reactor 2 Containment Vessel (the one I posted on my August 4, 2013 post). The snippet was used while the announcer was saying "It [groundwater]'s now so high the water will soon reach the surface. Then it will start flowing overground into the sea."
BBC seems to be trying to pass off the grating inside the Containment Vessel as a grating over some underground drain, about to be flowing overground...