Weighing about 103MB and embellishing upon Half-Life 2's next expansion pack, in WMV9 video/audio 720p 1280x720 128 Kbps transfer rate/44 kHz output rate HD format, be sure to download it at FileFront.

Need I say more!? Weighing about 28MB and being the same format as prior (720p, though), ModHQ is your constituent.

VALVe Software, altruistically keeping to their word, have finally released the Episode Two WMV9 1280x760 HD (weighing approximately 50MB ) trailer that flaunts the Portal game/map technology that the Episode Two version build release will make the inclusion of (and lucidly leverage, for that matter).

Be sure to download it at FileFront.