HD: Define your terms 1

Wouldja know it, my screen is covered with dots.

In film, the dots are very, very small,
and they change from frame to frame.
The picture is put on the screen all at once.

In video, the dots are big, and
always appear in the same place.

The picture is drawn, one pixel after
another, making one line after another.

In HD video, same thing, just more dots.