There was an Apple product announcement on October 20th 2009. That's when they announced the new LED-backlit Macbooks, the Magic Mouse and a new line of iMacs. By the time the Courier video was shown, there was a lot of speculation on what would Apple announce that October.

As for the September 9th event, it was disappointing. Lots of people expected a "one more thing" moment with what would become the iPad.

So, it was right after an Apple event and right before a couple product announcements from Apple.