У вашего броузера проблема в совместимости с HTML5
Here's a Tandem Gravely tractor that I built. It has been around for a while now, as I built it this past late fall. Was planing of keeping it a secret for the Mow-In, but I though it was too neat not to show. I didn't use any plans to built this, most of it was done as I went along. Sure is fun to drive! Here's the pictures slideshow video of the build process- http://www.youtube.com/watch?v=HCToBD9Fq5g