Entourage Promo Trailer

[Todd Kopriva]

I think that you could accomplish this with time-remapping and Hold keyframes.

To make each frame of the video look crisp like a photograph shot with a fast shutter—like in the example clip—you should shoot to get as little motion blur as possible, meaning a low shutter angle.

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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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[Erik Waluska]

For the sections where the characters appear to be separated from the background giving the appearance of a 3D scene you have to cut the characters out by rotoscoping or other means, then put them on separate layers and either scale or move them in 3D.