Oh, I see that people think it's problem with the website, that is regarding to what I wrote. No it's not. It's exactly as Mach wrote, just cuz we can drop there a 50mb video that will play in background doesn't mean we should. The website should be fast, responsible and good looking.
Unfortunately we didn't manage to get a good looking video that would also be small enough not to chog up the bandwidth of the end user, especially ones with slower connection. Then there is also scalability issues etc.
Though if you are willing to pursue it feel free to do so, I'm by no means expert so most likely there is someone who can whip us a good video, that's small in size while still good looking. In that case I think Javi wouldn't be against having one on the website considering he(or maybe someone else) was looking into it.