The implication that the experiment cited was at all meant to backup the assertion that there exists a

phenomena wherein men tend to feel the need to dominate discussions regardless of their actual qualifications

is very clearly a mischaracterization. What I did was describe the content of the video in a comments section otherwise devoid of any evidence that anybody had watched the video. If you are interested in looking into the body of work that establishes the tendency of men to talk over others, I have found the full-text of the fairly foundational metastudy “Understanding Gender Differences in Amount of Talk: A Critical Review of Research”. It’s notable that most of the research on this topic leading up to the present day has been framed as answering the age-old question “Do women talk more?”.

attributes a lot of reasons for why the men did this

Those are not reasons in so far as they are meant to explain the men’s motivations but rather the methods by which they wrestle and maintain control of the discourse. It’s important to understand that this is written largely to bring them to the attention of the folks that are actively marginalized by these activities, so that they may counter and dismantle these systems.