Silly answer: It's a Terrier Malemute with an improve Malemute upper stage.
Serious answer: it's a sounding rocket based on the US Navy RIM-2 Terrier surface-to-air missile from the 1950s as the first stage, with a Thiokol Malemute upper stage. The Terrier is used as a first stage for a variety of small rockets.
A recent launch of note that used Terrier-Malemute variants was ATREX.
According to a number of sources, the reason this happens is related to the way YouTube partners with companies like Scripps. Essentially, when one of YouTube's enterprise customers uploads a video, in the process of making it available YouTube kicks off an automated search that immediately goes looking for other copies of that video, already online.
This is why a video that's been on YouTube for months or years and is clearly someone else's property can get shown on a late night talk show and then suddenly get a copyright takedown
In short, YouTube assumes that if one of their paying partners uploads a video, it must belong to the company, and no matter how long that content has been on YouTube before Scripps, NBC, or whoever uploads their copy, it must be a pirated copy.
Two wrights don't make a rong, they make an airplane. Or bicycles.