HL2:EP1 - Launch Teaser 4

From Valve Developer Community

Image:steam_available.png This Steam Media File is available for download.
Duration: 0:57 | Size: 29.2 MB | Game: Half-Life 2: Episode One
Enter steam://run/915 (http://panfrie.zergs.com/redirect.html?steam://run/915) in your address bar to play.
You can also enter steam://store/915 (http://panfrie.zergs.com/redirect.html?steam://store/915) or visit the store (http://storefront.steampowered.com/v2/index.php?area=game&AppId=915) for installation. 		Image:steam_movie.png
Retrieved from "http://developer.valvesoftware.com/wiki/HL2:EP1_-_Launch_Teaser_4"