While Ultraviolet digital copies have been pitched as a way to make watching videos online easier, so far they’ve lead to frustration for many users. A recent incident involving the early release of Veronica Mars for Kickstarter backers was a low point, Apple, Google and Microsoft all have yet to tie their services in, and now Disney is finally rolling out its own Movies Anywhere system. To get back on the positive foot, Walmart’s Vudu streaming service is shining a light on Ultraviolet’s ability to let users share their library with up to five friends.