Building a brand on YouTube
Keep in mind that these videos are not merely informative, but vehicles for building value in the brand of each YouTube personality, especially for a YouTube personality like Renetto. He is marketing himself and his "special" status to the corporate community and to the YouTube audience.
He and others are also acting as a kind a quasi-market test for the corporate entities that they have contact with.
Renetto is a "normal" guy from Ohio, who apparently came on to YouTube as one of the mass, but has built a kind of brand identity as the un-official spokesman for YouTube users - with the accompanied scorn and support of YouTubers.
He obviously leverages this to establish relationships with corporate entities as well as other users. This is for his own advantage, and that has a negative connotation for some on YouTube. So there is an aspect of "credibility”, that is unique and complicated in this format of distribution. YouTubers tend to poo poo polished content, or content that is not "real" as much as they tend to go into a frenzied delight over the controversy. It is a distribution channel with its own content expectation and delivery style tensions. How credible serialized content is depends on a delicate interplay of reality and verisimilitude.