You can open it directly by click this url.
I am use HTML5 slide template from Google I/O 2012. You can find more details by check out this.
If at some point you should need a web server, use serve.sh. It will
launch a simple one and point your default browser to http://localhost:8000/template.html:
$ cd io-2012-slides
$ ./serve.sh
You can also specify a custom port:
$ ./serve.sh 8080
The slides contain a presenter mode feature (beta) to view + control the slides from a popup window.
To enable presenter mode, add presentme=true to the URL: http://localhost:8080/index.html?presentme=true
To disable presenter mode, hit http://localhost:8000/template.html?presentme=false