Using Vegas 22, I have converted some old newsreels from 25fps to their original speed of 24fps. When playing them back on TV, I expected the frames to be either blended out to 25fps, or to have a duplicated frame every second to match the TV standard. But they play smooth as silk, particularly noticeable when, for example, a car travels from one side of the screen to the other.

I would be most grateful if someone could explain.