Can anyone illustrate how to resolve the following errors and allow me to authenticate through the oAuth client ID to return 6 videos from our youtube channel using a search term?

POST 400 (Bad Request)Understand this errorAI cb=gapi.loaded_0?le=scs:169

GET ;fields=kind%2Cname%2Cversion%2CrootUrl%2CservicePath%2Cresources%2Cparameters%2Cmethods%2CbatchPath%2Cid&key=API-KEY 404 (Not Found)

cb=gapi.loaded_0?le=scs:153 Uncaught {error: 'idpiframe_initialization_failed', details: 'You have created a new client application that use…i/web/guides/gis-migration) for more information.'} details:"You have created a new client application that uses libraries for user authentication or authorization that are deprecated. New clients must use the new libraries instead. See the Migration Guide for more information." error: "idpiframe_initialization_failed"

// Load the Google API client library
function loadClient() {
    import(".js").then(() => {
    gapi.load('client', initialize);
    }
)}

// Initialize the API client
function initialize() {
    gapi.client.init({
        'apiKey': 'API-KEY',
        'clientId': 'CLIENT-ID.apps.googleusercontent',
        'scope': '.readonly',
        'discoveryDocs': ['']
    }).then(function () {
        // Call the API to search for videos
        searchVideos('SEARCH-TERM');
    });
}

// Search for videos using the YouTube API
function searchVideos(searchTerm) {
    return gapi.client.youtube.search.list({
        'part': 'snippet',
        'q': searchTerm,
        'type': 'video',
        'maxResults': 6
    }).then(function(response) {
        displayVideos(response.result.items);
    }, function(error) {
        console.error('Error: ' + error);
    });
}

// Display videos on the WordPress page
function displayVideos(videos) {
    const videoContainer = document.getElementById('video-container');
    videoContainer.innerHTML = '';
    videos.forEach(video => {
        const videoElement = document.createElement('iframe');
        videoElement.src = '/' + video.id.videoId;
        videoElement.width = '300';
        videoElement.height = '200';
        videoElement.allow = 'accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture';
        videoElement.allowFullscreen = true;
        videoContainer.appendChild(videoElement);
    });
}

// Load the Google API client library on page load
window.onload = loadClient;// JavaScript Document

<div id="video-container"> </div>