Editors' pick: Originally published March 26.

Walmart (WMT) - Get Walmart Inc. Report is taking another swing at Amazon (AMZN) - Get Amazon.com, Inc. Report , while also throwing a few punches at digital streaming companies Netflix (NFLX) - Get Netflix, Inc. (NFLX) Report and Hulu.

On Thursday, owners of nearly 8,000 DVD and Blu-ray movies from Lions Gate Entertainment (LGF) , Paramount Pictures  (VIAB) - Get Viacom Inc. Class B Report , Sony (SNE) - Get SONY GROUP CORPORATION SPONSORED ADR Report , Twenty-First Century Fox (FOX) - Get Fox Corporation Class B Report , Universal Pictures (a division of Comast  (CMCSA) - Get Comcast Corporation Class A Report ) and Warner Bros. (TWX) can convert them digitally to their Apple (AAPL) - Get Apple Inc. (AAPL) Report iPhone or Alphabet's Google (GOOGL) - Get Alphabet Inc. Class A Report Android smartphone through Walmart's subscription-free, on-demand streaming service Vudu.

Here's how it works.

One goes to "Disc-to-Digital" in the Vudu app and scans the barcode on the DVD or Blu-ray. If you choose to convert a DVD to SD or a Blu-ray to HDX, it costs $2 per title. To upgrade a DVD to HDX, it costs $5. All Vudu users get a one-time complimentary conversion. Vudu users can upload as many movies as they want at a time and they will be stored on their enabled devices.

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Currently there are about 8,000 titles available for mobile conversion, but Vudu said additional titles will be added in the coming months.

"The average movie collector owns nearly 100 DVDs and Blu-rays," said Jeremy Verba, general manager at Vudu, in a statement. "We know these curators have invested a lot into building their physical movie collections. As more and more customers create digital libraries, we are constantly looking for ways to help them unlock additional value from the movies they already own."

Walmart acquired Vudu for an undisclosed sum in 2010. Last October, Walmart launched "Vudu Movies on Us," which allowed users to stream about 1,000 movie and TV show titles for free. The move was the company's attempt at attracting subscribers to its core Vudu business, which offers titles for rent or purchase.

The new efforts by Vudu are part of a broader digital push by Walmart of late.

The world's largest retailer launched a new app for money services and pharmacy customers, creating a faster, easier and cashless option. While customers still have to come into the store to pickup prescriptions and verify payments made through money services, express lanes will be set up, reducing wait times to as little as 40 seconds compared to six to 11 minutes, according to the company.

And early this month, Walmart revealed at a media gathering that it's testing a touchscreen monitor in its toy aisle at certain stores in Texas. The monitor helps parents and children alike find exactly what they are looking for in the store, and if it's not in stock, it directs customers directly to its website to order the item online.

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