How to play bink videos in Unity?

I want to know how to play Bink (.bik) video in Unity. I have unity 4.6.3f1 .
It would be great if any one can post some sample code. The RAD game tools website says they give pre-written integration of bink videos for unity. Should I need to purchase their SDK?

This is what radgamestools.com said :

Bink runs on most game engine middleware natively. Epic supplies pre-written Bink support for the Unreal Engine, for example. We supply pre-written integration for many other engines such as Unity.

But i think you need to be a licensed customer in order to have this feature. Visit their site and have a read.

Anyway i have sent an email to RAD support team and we will wait for their answer.