How to make a site appeal to search engines on other sites?

Question

Search engines

How do I make the search bar on a site refer to other search engines on other sites? For example: a user enters a query into the search bar on the site and the search refers, for example, to youtube and showed information from YouTube, or to some other service, it doesn’t matter, just how to make the search on the site refer to other search engines on other sites ???

Answer 1

This would be possible if third-party sites provided such an opportunity through an API.
But they are not enemies of their business, so you will not get such an API. They are not idiots.
The way out is parsing. But this is hell.
Dude, you seem to be quite new to the internet.

Answer 2

you can try sending a GET or POST request to the search engine site, cutting out the content itself from the response page and removing any mention of this search engine site