How do I check if a video exists on YouTube, using PHP?

Question

How do I check if a video exists on YouTube, using PHP?

Answer 1

http://www.youtube.com/watch?v=bQVoAWSP7k4  
http://www.youtube.com/watch?v=bQVoAWSP7k4&feature=popular  
http://www.youtube.com/watch?v=McNqjYiFmyQ&feature=related&bhablah  
http://youtube.com/watch?v=bQVoAWSP7k4

var matches = $('#videoUrl').val().match(/http:\/\/(?:www\.)?youtube.*watch\?v=([a-zA-Z0-9\-_]+)/);
if (matches) {
    alert('valid');
} else {
    alert('Invalid');
}

Answer 2

You should request to this URL

https://www.googleapis.com/youtube/v3/videos?id={the_id_of_the_video}&key={your_api_key}&part=status

After that, you will receive the response json that contains uploadStatus field

{
    etag = "\"I_8xdZu766_FSaexEaDXTIfEWc0/8QgL7Pcv5G8OwpNyKYJa8PaQTc0\"";
    items =     (
                {
            ...
            status =             {
                embeddable = 1;
                license = youtube;
                privacyStatus = public;
                publicStatsViewable = 1;
                uploadStatus = processed;
            };
        }
    );
    ...
}

And there are 5 possible value for uploadStatus

deleted, failed, processed, rejected, uploaded

For uploadStatus = processed or uploaded => your youtube video is available