OpenMax IL - Video API Guidance

I am new to OpenMax and I am been told to bring OpenMax IL on Video application for our graphics chip.

To start with, I have downloaded “OpenMAX IL” specification (PDF) and header files (.zip) as available."

Is there any key things to be focussed while going through pdf document of Chapter# 4(Video) for working on Video for begineers.

Any clue to start with?

Mukesh K Srivastava