If you haven't figured it out from the portmanteau above, this is a mashup of Nelly's "Ride Wit Me" and Pachelbel's Canon in D by an acapella group called Gentleman's Rule.
It's eh-whatever until about one minute in, at which point it becomes the most fun beautifully-shot dream day that anyone in this video has ever had (and, likely, will ever have again), including their actual weddings. Next time you're sweating your ass off at a summer wedding, making tipsy, disinterested small talk with someone's aunt, ask her if she wants to go smoke an L in the back of the Benzie. Because you know what? She just might.