Reply #4: I think it's on the game itself [View All]

you have to make a video of it and begin recording everything 5 seconds before you turn on the system.

To compete, gamers must play in MLB Today mode, select from any of the available matchups, and then choose the option to participate in the ‘Major League Baseball 2K10 contest’ that will automatically default to the proper gameplay settings according to the official gameplay rules. Entries must be recorded via camera or digital video recorder in compliance with guidelines provided by 2K in the Official Rules, and all eligible entrants must submit a copy of their recording in its entirety for verification. Submissions will only be accepted on DVD. To ensure accuracy in the verification and submission process, 2K Sports has partnered with Twin Galaxies International, the worldwide authority on video game world records, and provider of scores to Guinness World Records that are published in the Guinness World Records: Gamer’s Edition.

http://2ksports.com/news/mlb2k10/377