So once you have downloaded a movie from Sky Movies how do you get it onto the ipad, can you just drag it over in itunes? or do you need to convert it? or does it have something inbuilt that stops it working on an ipad?

I want to fill up my ipad with movies for a holiday,what is the best way to do this? Bearing in mind I already subscribe to Sky for £50 per month I do not wish to join any other movie subscriptions.

Thank you for any help.