With video cameras now sporting 4K video - that's the equivalent of 8 Megapixels, each frame is capable of looking like a pretty decent still photograph. This means that not only can you grab high quality frames from video to use in still image media, it might actually be the best way in the future to do still photography, because you will have a wonderful, 24 or even 60 frames per second to choose your stills from
But the technique is not without issues, if you're doing a true dual media shoot.
As you can see from the lovely images in this video, the best settings for video might not be the best ones for a still image. (The camera in question was the Canon 1D C.)
Thanks to Jay P. Morgan from The Slanted Lens for making this video available.