As I am going through this youtube scraping tutorial https://www.youtube.com/watch?v=qbEN3boz7_M, I was introduced that instead of scraping from the "public" page loaded heavily with all other stuff, there is a way to find a "private" page to scrape the necessary information much more efficiently using inspect element/firebug.
google chrome > inspect element > network > XHR
The person in the youtube video uses stock price as an example and be able to locate a "private" page to scrape much quickly and less intensive to the server. Though when I tried to look at sites I wanted to scrape, for example, http://www.rottentomatoes.com/m/grigris/, going through the inspect element (chrome) > Network > XHR > checking the headers' request URL and preview, I didn't seem to find anything useful.
Am I missing something? How can I ensure if a raw or condensed information is hidden somewhere? Using the Rottentomatoes.com page as an example, how can I tell if there is 1) a "private page" that gives the title and year of the movie and 2) a summary page (in csv-like format) that "stores" all the movies' titles and year in one page?