NOTTINGHAM, England (via Skype) – British retailer Marks & Spencer is using video on its site and is finding that visitors who watch video stay on the site twice as long, says Forrester Principal Analyst Martin Gill in this interview with Beet.TV.

Gill just published a report ($499) on the opportunities for video on e-commerce sites and beyond in social media and on YouTube. 

The study looks at several British online retailers and the role of two U.S. video services providers: Brightcove and Limelight.

We spoke with him last week from his office in Nottingham, England via Skype Video.

Andy Plesser