How to check if a youtube video exists?

Question

Java

For example, there is an input field for a link, the user enters and clicks add, and if the video exists, it returns true

Answer 1

You send a request to this link, you receive a status 404 or 200, based on this you make the necessary callback

Answer 2

1. regularly check that the url refers to the video
2. you can separately or combine with 1 , get the video id
3. pull asynchronously api video hosting (get information about the video)
4a add
4b notify about an error