As of March 12, 2011, meltdown in Fukushima 1 was reported and denied multiple times. Today a meltdown in Fukushima 3 is reported:
I am not aware of any videos or pictures of Fukushima 1 since the explosion:
-showing that no meltdown had occured or that that the containment is intact
-showing any human or robotic activity near Fukushima 1 (reported supposedly cooling of Fukushima 1 using sea-water and bor).
Ongoing summary of the news on Fukushima @ Greenpeace:
Still no radioactivity measurements on Fukushima:
Some interesting watching on Tchernobyl, i.e. the myth of the so called “Sarcophagus”: