getYoutubeVideoTitle.js

var ids = [ ... ];

ids.forEach(function(id, i){
    callApi(id);
});

function callApi(videoId) {
    $.ajax({
        type: 'GET',
        dataType: 'json',
        // async: false,
        url: 'https://www.googleapis.com/youtube/v3/videos?id='+ videoId +'&key= [key] &part=snippet,contentDetails,statistics,status',
        success: handler
    });
}

function handler(res) {
    vtitle = res.items[0].snippet.title;

    // console.log(res);
    console.log(vtitle);

    $('#' + res.items[0].id).html(vtitle)
}