How to get YouTube video thumbnail via API in PHP? (curl, YouTube Data API)

Hello everyone! I'm a beginner PHP developer trying to display a preview (thumbnail) for YouTube videos on my site. Videos are uploaded by users, and I need to dynamically get the image by video ID. I've heard that you can use YouTube Data API v3, but I can't figure out the requests. I tried parsing the video page via file_get_contents and regex, but it's unreliable and often breaks. My current PHP code (not working): ```php