You should watch the video again. The majority of the video describes how to set up the robots on an FTMO demo account and how to determine the top 1 and top 3 robots to trade. In one of his challenges he trades with just 1 robot and in a second challenge he trades with the top 3. Near the end of the video he then mentions he also passed a challenge by trading all 8 robots. If you decide to trade all 8 robots pay attention to the account risk.
Alan,