i create a metabox with 'import' button in post.php. Also, ready for youtube api data code. but i need, "when i click 'import' button to run youtube api data function and the values are print in toolset custom fields metabox" before i publish or draft the post. after, i check the data is correct then will publish the post in wordpress php.

function add_your_meta_box()
    {
    
    add_meta_box('import-data', 'YT Import', 'function_of_metabox', 'movie', 'side', 'high');
    }
    
    add_action('add_meta_boxes', 'add_your_meta_box'); 
    
    function function_of_metabox()
    {?>
        <input type="submit" class="button button-primary button-large" value="Import" id="Import"/>
    <?php }

button meta box

    function my_add_custom_fields1(){
$post_id = get_the_ID();   
$meta2 = get_post_status($post_id);
$meta3 =   get_post_type( $post_id );
$meta1 = get_post_meta(get_the_ID(), 'wpcf-song-duration', true);  
$ytURL = get_post_meta(get_the_ID(), 'wpcf-song-av', true);
// video id from url
$YouTubeCheck = preg_match('%(?:youtube(?:-nocookie)?\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)([^"&?/ ]{11})%i', $ytURL, $Data);
    If($YouTubeCheck){
        $youtube_id1 = $Data[1];
    }
    // video json data
$dur1 = file_get_contents("https://www.googleapis.com/youtube/v3/videos?part=contentDetails&id=$youtube_id1&key=AIzaSyAbFclaJBklZ53t_UD-Xz85FbWsfD37sX0");
$duration_key1 = json_decode($dur1, true);
$duration1 = $duration_key1['items'][0]['contentDetails']['duration'];
$start = new DateTime('@0');
$start->add(new DateInterval($duration1));
$h11 = $start->format('H:i:s');
// print the value toolset meta box using print_r $h11;
}

print value toolset custom field meta box toolset custom field meta box