My workflow (when traveling) is that the 5D Mark III saves to both cards, and after that I use the SD slot on my MacBook Pro for importing to lightroom. I then use the camera to format the cards.
For some reason the videos are only saved the CF card.
Because of that, unfortunately I deleted a wonderful video from the metro in Paris, of people playing music.
Is there any way to make the camera save videos to SD as well?