Wal-Mart offering an easy digital movie option for customers that buy DVDs, Blu-Ray discs

A new Wal-Mart service, InstaWatch, is giving customers who buy physical DVDs and Blu-Ray discs another way to watch some of them online.

Most physical copies of movies already include free digital versions. To watch them, you need to find a code included with the disc, go online and redeem it.

InstaWatch, which launched in a test version on Wednesday and works with Wal-Mart's digital entertainment service, Vudu, lets customers scan a receipt to automatically download a digital copy of the movie. Customers will receive a text or email within a few minutes that the video is ready to view. They must watch it in a Vudu account.

Consumer tastes are shifting more to accessing streaming or digital content rather than buying physical media, and Wal-Mart is trying to drive more customers to Vudu.

To begin, about 800 movies in stores and 1,100 movies online are part of the program, including "X-Men: Days of Future Past" and "Mr. Peabody & Sherman."