למחיקה

function checkYouTube() {
var youtubeIframe = document.getElementById('youtube-iframe');

youtubeIframe.onload = function() {
console.log('YouTube is working');
};

youtubeIframe.onerror = function() {
console.log('YouTube failed to load');
switchToVimeo();
};
}

function switchToVimeo() {
var youtubeIframe = document.getElementById('youtube-iframe');
var vimeoIframe = document.getElementById('vimeo-iframe');

youtubeIframe.style.display = 'none';
vimeoIframe.style.display = 'block';
}

checkYouTube();