yup, i think what Ding means is not only having all the crackles and bits of hair in the cutscene, but also making the colour a bit faded, or even duotoned. the first bit is perfectly doable as has been pointed out.
the second bit i'm not too certain on. it's possible to use a similar technique and create a semi transparent resource over the screen as the 'movie' is playing, but it will look like just that - a layer slapped over the screen, and not really the effect you're after. it won't desaturate the colours, it will just make everything look a bit more brown or whatever colour you make the layer.
a combination of the two will probably come close, but i think you'll have to compromise in the end as with so many things in flashpoint