Size of Resource and SEO Value
We know scope of resource matters. What is the most important mountain on earth? Probably Mount Everest. Why? Because its the biggest. Same thing applies to websites. This DOES NOT mean you should just build giant page heavy websites. You should build the best and biggest resource. Video info, social media, and pictures all help show the scope of your site. If you have two websites that are fundamentally the same in every way, the larger one tends to rank higher on Google.
Building great resources is probably the best long-term search strategy anyhow. You want to build the biggest and the best resources because (by definition) thats what search engines want to catalog. The best search engine result gives the most useful resources for that search.