Video presentation for new websites

Many of the projects we complete are short term campaigns for UK businesses, this may be social media campaigns or product related websites such as..... a new television release or computer game.

Seeing as these website are taken offline within 3 months of launch we wanted a way to present them on our portfolio and to new potential customers in a better way than just jpg's. For this reason I would like to work with someone who is able to create a video presentation for all our short term projects which showcase the UI and functionality of each site.

Please add examples of product videos you have done in the past, I am not looking for long videos, maybe 30 seconds to 1 minute per project.

Thanks.