Via Instagram's official blog:
"Today, we're thrilled to introduce Video on Instagram and bring you another way to share your stories. When you go to take a photo on Instagram, you'll now see a movie camera icon. Tap it to enter video mode, where you can take up to fifteen seconds of video through the Instagram camera.
You'll also find that we've added thirteen filters built specifically for video so you can keep sharing beautiful content on Instagram. When you post a video, you'll also be able to select your favorite scene from what you've recorded as your cover image so your videos are beautiful even when they're not playing."
This isn't a surprising move from Facebook; Twitter's video sharing app, Vine, has been blowing up in recent months, so it's only natural that Facebook would use its 1-billion photo-sharing cash cow to challenge Vine's rising popularity.
What does this mean for you? Crappy, potato-cam quality videos taken by friends saturating your news feed, most likely...