Enquiring minds wanna know.

Tecchies, I need your help!

A post over at thegreatwar features an embedded version of the Passchendaele trailer. I can't figure out how the poster did it.

Does anyone know how to do this? Or are there instructions somewhere on the website that I'm not seeing?

Now I'm off to move the final bit of my stuff from the old place in the reallyhotheat (which is also why I need an extension on my ds_northernnews story). Yay?