The page describes how best to choose keywords which is the point of the test. The content in this case is less relevant to the page - as of yesterday I was ranking page one for 'optimise URL' - after four days and the content of the page rather than an ultra targeted landing page does go into how to choose which URL to target. I am not testing if this works, I am testing how well it works and what other factors are how important.
Currently ranked number 9 for "optimise URL" after four days so I changed the text and titles to be more relevant for these keywords. I will launch a youtube channel in the next week and put a relevant video on the page with no subscribers or views, just a relevant description and see if that has any impact on my positioning.
That is the point of the study - using a page which is fresh to test things on without worrying about the SEO impact because I haven't started working on offpage factors yet so I am purely testing how effective onpage factors are alone, one at a time starting with simple keywords.
When I work I usually go completely the opposite way and get a good social media campaign running to get people to build natural links inbound which is also known to work - but this gives solid data on how much weight URL and content has without other factors and when complete I will present the information in a way that is useful for anybody planning on building a landing page.