The last 3 or so days I've had inordinate trouble loading the TEPCO webcams. It often takes me up to 8 tries to get a TEPCO cam loaded.
The TBS cam was off for quite some time (couple of weeks), although it went back up about a week ago. Until today, the view on the TBS cam has been occluded by the atmospheric conditions.
Netc.com has been indicating elevated radiation levels near Tokyo. Run the animated graphic at the site to see the pattern. I'm not sure whether Fukushima is the source of the elevated levels.
These screenshots were taken within a ten minute period July 17, 2016: