What surprised me in the story -- and I'd need to confirm it elsewhere -- is that video requires less speed in storage than stills does. Given the relative quality of any video frame I can almost believe it, but there sure are a lot of them and, nifty compression algorithms notwithstanding, it seems counterintuitive. I don't shoot videos with my Fujis, but we do use a couple of LX-5s to make instructional DVDs that have been pretty successful. (There, the problem has never been card speed but the absurd limit of about 8 minutes per scene. Makes my editing life problematical, synchronizing two video streams and an audio stream, without them beginning or ending at the same time.)
Then again, my first digital camera was a Sony which wrote directly to floppy, with no discernable buffer. That was slow! (And a single floppy would hold only four highest-quality images, so I had to carry a bag of floppies when I shot an event -- felt only a slight improvement over a 4x5 press camera, with two pictures per film holder. And 4x5 pictures are a whole lot better!)