Burbn’s popular photo-sharing app Instagram (free) has added video in version 4.0. The addition will provoke comparisons to Vine, but the two are much different: Instagram video lets users take video clips as long as 15 seconds, and 13 video filters are also available. Videos notably do not loop, as they do in Vine. Cinema, an image stabilization feature, is available for those using the app on an iPhone 4S or 5. Lytro, maker of the Lytro Light…
