I just found this video tutorial (?) about achieving filmlike video. It talks about screen ratios, interlaced vs progressive shooting, and more.
For a 5 minute video, it packs plenty of info. It missed one very important point (that I frequently come back to): LIGHTING.
Lighting is one of the magic ingredients when going for filmlike video. Just look at the segment in question – the blue background light creates much needed separation between subject and background. (In video, this separation is often achieved by adding a certain color – usually blue; in film, you have many more options.)