Social media companies are in a constant tug-of-war against the end users when it comes to controlling what the users see. The ideal is that the user has absolutely no control over on what they see and the social media company can fully dictate content. That is what makes the money.
Allowing users to freely query content in their own websites is completely antithetical to what they are trying to do. YouTube is also very aggressive in preventing scraping and limiting the usage of the official API. Which is quite ironic considering the history of the company.
Google: appeared open to start things off, then went whole hog on the MS embrace-and-extend philosophy, aiming to crush the life out of the entire web.
Allowing users to freely query content in their own websites is completely antithetical to what they are trying to do. YouTube is also very aggressive in preventing scraping and limiting the usage of the official API. Which is quite ironic considering the history of the company.