If you want them for posterity, you can download the files (if you don't mind downloading 14 zip files for the Reactor 1 and 8 zip files for the Reactor 3) at TEPCO. The two iRobot's Packbots entered the Reactor 1 and Reactor 3 buildings on April 17. TEPCO decided not to show the fogged up image of the Reactor 2, though.
To download, here's the TEPCO link:
Alternatively, I've found that Mainichi Shinbun allows video embeds (that's very rare among major national newspapers; it deserves a special mention here), so here they are:
If you want to embed these on your site, go to the Mainichi's vid site here:
For the 1st vid: http://video.mainichi.co.jp/viewvideo.jspx?Movie=48227968/48227968peevee384424.flv
2nd vid: http://video.mainichi.co.jp/viewvideo.jspx?Movie=48227968/48227968peevee384436.flv
3rd vid: http://video.mainichi.co.jp/viewvideo.jspx?Movie=48227968/48227968peevee384454.flv