Thanks to cleolinda, I learned the true story. As it turns out, the Wassup (8 Years Later) remix is, well, an official remix.
According to the article Advertising: Why Budweiser Can't Stop the 'Wassup' Remix, Budweiser doesn't even own the rights to the original 'Wassup.'
See, waaaaay back in 2000, they "rented" the concept from filmmaker Charles Stone III, who made the original film short called "True." Budweiser paid $37,000 to have exclusive rights to the 'Wassup' concept for 5 years, after which the rights were returned to Stone who could then use the concept any way that he wished.
The Wassup Remix (8 Years Later) is his first remix of the original idea.
To make the remix even more clever, Stone used the exact same cast from his original, pre-Budweiser short to make the remix.
To view the non-commercial original, go here to check it out. To see the Budweiser version, as well as the 8 Years Later remix, check out this post.