They’re probably in the process of verifying views. Considering the unusual traffic BTS video has upon its initial release, I’m not going to be surprise if they put in place measures to prevent this traffic from being recognized as a DDOS attack.
It’s kinda strange that the views are frozen for so long, but the Youtube algorithm has always been massively inconsistent and inefficient in its job, so I figure we’ll be waiting for a while until the figure actually drop.