Included are videos for:
ATV Offroad Fury Pro, Gangs of London, Genji 2 (developer interview), God of War 2, Killzone: Liberation, Lair (developer interview), Lemmings, Loco Roco, NBA 07, Resistance: Fall of Man (developer Interview), Rogue Galaxy, Singstar, SOCOM US Navy SEALS: Combined Assault, SOCOM US Navy SEALS: Fireteam Bravo 2, Stranglehold (developer interview), Untold Legends: Dark Kingdom (developer interview), Warhawk (developer interview), world Tour Soccer'06.

Screenshots included:
ATV Offroad Fury Pro, Gangs of London, God of War 2, Killzone: Liberation, Lemmings, Loco Roco, NBA 07, Ratchet and Clank: Size Matters, Rogue Galaxy, Singstar, SOCOM: Combined Assault, SOCOM: Fireteam Bravo 2, World Tour Soccer '06

Music included:
ATV Offroad Fury Pro - Six songs from the game.

Download: [Sony's E3 PSP Content Pack] (93 MB)

Source: pspupdates

Also I just put this on my PSP and watched it.

Instructions: The videos are in AVC format so you'll need to have firmware version 2.0 installed. If you wish to watch the videos simply go into the videos folder, select the desired title, and transfer both the mpeg file and its accompanying .doc file into the "200ANV01" folder of your PSP. For music, you may simply transfer the entire folder over to your "MUSIC" folder on the PSP. Note that the audio is in AAC format. The pictures can be transferred directly to your "PHOTO" folder on the PSP, no specific firmware is required to view these.

Or you can just watch them on your PC without worrying about upgrades.