How do i do this?

[tracy]

I want to make a site similar to this

http://thexx.info/

how did they make the Video a "X" shape rather than the box shape? or is that done using video editing software?

 

[Rocko]

I would assume some sort of video editing effect.

 

[Broni]

It's done through simple CSS setting:

"overlay2.png", which is shown above, has a transparent cross and the rest of the image is black matching overall site background.