Now, this is just one social network on one (very new) phone, and yes, it’s going to be a holiday weekend in a couple hours. But the news is worth paying attention to because of the volume and nature of video-sharing that Facebook enables, and the active mobile content habits of iPhone users. In the few days after the iPhone 3GS release, YouTube (s GOOG), the biggest user video site out there, said its mobile video uploads were up 400 percent, with iPhone 3GS video already accounting for more than half the mobile video sent to the site.
Meanwhile, Facebook told us it sees a very significant — nearly 40 percent — chunk of its video uploads come from webcams. And at last check, Facebook received six times as many video uploads per day as MySpace, showing its personal video-sharing offering is resonating with users. The simple, accessible video sharing enabled by webcams has a lot in common with mobile phone video uploads — except with the added value of on-the-go, on-the-scene connectivity. Let’s just hope AT&T doesn’t get pissy about the upstream bandwidth.