Sky TV customers are being given the opportunity to trial Sky Go Extra for two months at no charge.
The service - which allows customers to watch Sky channels over the internet, in line with their channel subscription - is ordinarily priced at £5 per month.
It allows users to download content on up to four web-enabled devices at the same time, and stream live programming on two of them.
With the standard Sky Go service - which is available at no extra charge to Sky TV customers - consumers can only register two different devices.
Sky Go Extra subscribers can watch various channels online, potentially including those in the premium Sky Sports and Sky Movies packages.
Earlier this month, six new channels were added to increase their viewing options - ITV, ITV2, ITV3, ITV4, CITV and ITV Encore.
Should Sky TV customers wish to sign up for Sky Go Extra following the expiry of their two-month trial, they can do so on a non-contract basis.
This means they are free to cancel the service as and when they choose.