Microsoft founder and chairman Bill Gates was pushing the software giant to acquire internet video chat company Skype. The $8.5 billion deal was announced last week.

The acquisition is the largest Microsoft has ever done. And it was a great deal, Bill Gates said in an interview with BBC. He added that the deal was a strategic move. Skype is not very profitable, but it has over 660 million users worldwide. It gives Microsoft a solid user base for future video chat and video-conferencing products.

Microsoft has promised Skype integration across its product portfolio. It said that Skype will support Xbox 360, Kinect, Windows Phone and desktop software like Outlook. In addition Skype will still be available to multiple mobile devices, and for competing operating systems like Mac OS and Linux.

Gates said he believes video-conferencing will evolve a lot from what it is today and that Skype has a lot to gain in that area.