Viddy or SocialCam
Viddy or SocialCam

In Facebook's online road show, Facebook CFO David Ebersman told potential investors to "expect us to invest heavily in mobile." Facebook has already put its money behind that statement, grabbing photo-sharing network Instagram in its largest-ever acquisition.

Enter video-sharing apps Viddy and Socialcam, which have both been hailed as "Instagram for video." They're mobile-native creations that are spreading fast, thanks in part to their gaming of Facebook's "social sharing" tools. (Want to watch a Socialcam video on a friend's Facebook feed? You'll have to install Socialcam's Facebook app, which adds a fresh user to Socialcam's tally.)

Facebook is already the world's largest photo repository, displacing previous leaders like Flickr. If it wants to go head-to-head with YouTube, buying a hot video app would give it a head start.

By Laurie Segall @CNNMoneyTech - Last updated May 16 2012: 4:53 AM ET
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