How to get the number of followers from social networks (there is an example site)?

Question

Facebook

Hello.
I want to create a fan site on the example of this www.temnikova.ru
I need to extract the number of subscribers from social networks in real time.
My assumption is that it is done using the API of each network or a grabber or a parser + cron (updates the data).
I need to end up inserting something like this into the page <div id="youtube"></div>using PHP or JS or something like that. And the result is the number of subscribers on YouTube.
Please advise at least in what direction to move and whether this statistic will greatly affect the page load time.
I ask for advice or a ready-made solution, if any.
Thanks in advance to everyone for your attention.
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UPD: Is it possible to take all this data? Or do you need permission (access token) in some social networks from the owner of the profile (for example, Instagram)?

Answer 1

For VK user subscribers, use the method
with the fields = followers_count
parameter For a VK group
with the fields = members_count parameter
For a OK group with
the fields = members_count parameter Youtube and Instagram need to get a key for API requests. Read documentation: https://developers.facebook.com/docs/graph-api/ref... https://dev.twitter.com/rest/reference/get/users/show https://developers.google. com/youtube/v3/docs/chan...
https://www.instagram.com/developer/endpoints/user...