The correct answer to this open question is the following.
Although there is no link to watch the video and there is no name of the video to search for it, we can say that companies like Sears, Roebuck and Co. and Amazon were/are successful at the time because they were innovative companies that were ahead of their competence. In the case of Sears, the company sent salesmen to offer the catalogs and products of the company and paid special attention to customer satisfaction. That is how Sears could create an emporium, opening new stores in most parts of the United States.
Amazon also was a very innovative company, now, in the modern era of technology. Amazon was a step beyond its competitors, creating a service culture where everything was on time, guaranteeing customer satisfaction, from the transaction online, until the product was delivered at home or office.
