I actually just need the followers count of a public account, for example https://www.instagram.com/kygomusic/
The new Instagram's API rules are very strict (and discussed): It's now impossible to access public content for most of common apps. You need a public_content scope that is not granted to normal app (?!)
public_content: This permission (public_content) is only granted to apps that enable brands, advertisers, broadcasters and publishers to discover public content. We do not grant access to apps that do not fall into these categories. Please review our documentation (https://www.instagram.com/developer/review) for more information.
So I decided to scrape the data from Instagram
An option is to use file_get_contents() (PHP) and it works but it loads all the site from my server and it's pretty heavy. So my first idea was to use YQL. I use it for Twitter and works well, but when I scrape data from Instagram I get nothing: