Jobintourism,
It's an interested little video but insanely brief. I've been thinking each site has to pass certain factors (simple go/no go). Keyword, relevant content and clean code are things that matter but there is no real way to associate a numeric value to them. Each of those main metrics likely have smaller metrics that determine whether its a pass or fail. To determine if the content is relevant Google likely parses the page for keywords, related keywords, supporting links and keyword density. If the webpage passes those sub metrics the site will pass for the main relevant content metric.
This is the only real way to analyze a page for 200+ factors quickly. I'm looking for anything people have noticed that may be a constant or an interesting variable.
-Shane