Just a few comments to add, or perhaps to simply reinforce Marks post above
I think that there is a "fluidity of motion" and subdued vibrancy that gives film look that "non digital" appearance
Edges dont look razor sharp and subtle differences in colour variations easier to see
I personally think that although the "Film look " may represent the holy grail of video, Digital video can be quite decent to watch and some films have been shot digitally albeit with "state of the art" kit
Even so with digital
The frame rate can be done with video,
The "depth of field" is really a function of Lens, sensors ( film does tend to be bigger) ect ( see reply to your other post)
Colours: Film simply has a wider dynamic range of colours , that is a physical property
and as stated, a Dark scene is likelier to look dark, not "speckly"
In a way this analogy is not unlike Film vs Digital images with Still cameras except that the way motion is portrayed is specific to motion video also come into play
In large measure costlier ( More Pro) video hardware can emulate film ( and there are PP techniques , some of which work better than others to "fake" it
Some of the more High end Video cameras (I use the phrase loosely for want of a better description for them :some cost tens of thousands of pounds) aspire to Video cinematography and use various methods to look less like video and more like "film"
There was a somewhat contentious thread about it
Real Cinema 24p or 25p?
Suffice to say trying to achieve it with a consumer camcorder is what the camcorder marketeering machine would like but in reality a bit of a myth