Every Friday, find five quick links about compelling technologies, emerging trends, and interesting ideas. Source: the internet.

1. Facebook, as widely predicted, rolled out a comprehensive Instagram video offering. Instagram opted for a 15-second format — practically longform compared to the mere 6-second Vine. Will 13 filters, editing capability, and a stabilization feature topple Vine?
2. Twitter purchased Boston-area Spindle. The mobile-only discovery app had a talented former Microsoft team behind it, and will add an important location data layer for Twitter.
3. Highland Capital Partners announced a $25 million fund to jumpstart Leap Motion development for “solving human scale problems” in sectors including education, healthcare IT, big data, and productivity. There’s a post-mouse world coming, and 3D mobile tech will need developers to beef up the application ecosystem.
4. WhatsApp now has more than 250 million active monthly users. Messaging is a crowded space, but it’s already bigger than Twitter and has the telcos concerned.
5. Fascinating read for marketers and scholars alike: English is not the dominant language of the web. Ethan Zuckerman explains how this understanding changed Global Voices editorial approach.