Nice creative idea by the Gmail team. They are asking users to send in video of themselves passing along the Gmail ‘M’ logo, as a way of participating in a Gmail promotional video. This is the video Google made:

And you can get your face in there as well. Just upload a video to YouTube of you passing the ‘M’ logo from the left side of the screen to the right side (under 10 seconds, audio not important), and Google will rotate a bunch of entries on the promo page, with the best ones becoming part of the official video and shown on the Gmail home page.

Gmail: A Behind the Scenes Video