NB: intros (by those other people at the start of each video) tend to be long (especially for the first presentation (which is by the way very interesting as well)), I'd maybe skip them.
There are a couple of other videos from the series on youtube, but the original collection of twelve was removed from google video once that service became defunct. They are still available via somewhat obscure means from the original source:
webpage (original now gone from the source for some reason) with links to original AVIs and PPTs: http://kostas.mkj.lt/almaden2006/agenda.shtml ; I'm redownloading those AVIs now just in case... (www.almaden.ibm.com/institute/resources/2006/Disk[1-12].avi (replace integer interval with a single integer.))