The inclusion of different historians in the video can contribute to the development of the main idea in several ways.
Firstly, different historians bring different perspectives and opinions to the topic being discussed, which can provide a more well-rounded and nuanced understanding of the main idea. For example, if the video is discussing the life and legacy of Alexander Hamilton, historians with different specializations such as political history, cultural history, and military history, may provide different interpretations of Hamilton's actions, which can help the audience to understand the complexity of the main idea.
Secondly, different historians may use different types of evidence to support their arguments and interpretations of the main idea. This can help the audience to understand how historians use evidence to make their arguments, and how different pieces of evidence can be used to support different interpretations of the main idea.
Lastly, the inclusion of different historians can help to challenge and complicate the audience's understanding of the main idea, by exposing them to multiple perspectives and interpretations. This can help to develop critical thinking skills and encourage the audience to form their own opinions about the main idea.
An example of this could be a video discussing the life and legacy of Alexander Hamilton and the role he played in the formation of the United States, different historians may discuss his contributions as an economist, his role in the formation of the federal government, and the impact of his death on the nation, this would give a broad understanding of Hamilton's role and contributions in the US history.