Today, at The Next Web Conference in Amsterdam we sat down with the UK startup Six3, who recently launched a free service that allows users to send short, private video messages between smartphones and computers. The company was one of the 22 finalists from the latest London Seedcamp, the European seed investment and mentoring program which we’ve written about extensively in the past.

Six3 video messages can be created on iPhones, PCs & Macs, and viewed on other video-capable smartphones and feature phones. It will shortly be rolled out to other mobile platforms, including Android, BlackBerry and Windows Phone. But enough writing, let’s hear all about Six3 from the company’s CTO Simon Frost.