Ideally, the contract should stipulate that you agree to have brand placements in upcoming content that isn't outside the ordinary of what's come before it (i.e., an alignment of values), ergo not stuff like this that comes out of nowhere and is unlike anything else thus far. The pros will want to approve each and every video prior to publication, but a staggering number of mid-sized biz don't sign off or see it beforehand because they perhaps quite naively trust people to err on the side of good taste and legality.
Publicity stunts and gimmicks are nothing new, even extreme ones, it's just now it reaches the entire world instead of just that area or country, especially if the "story" is pretty much as simple as a YouTube URL and a pithy summary from a journo.