HTML:

<div data-video="_nj-LnZqY-0" data-autoplay="0" data-loop="1" id="youtube-audio"></div>
JS:
<script>
        var tag = document.createElement('script');
        tag.src = "https://www.youtube.com/iframe_api";
        var firstScriptTag = document.getElementsByTagName('script')[0];
        firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
        var player;
        function onYouTubeIframeAPIReady() {
            var ctrlq = document.getElementById("youtube-audio");
            ctrlq.innerHTML = '<img id="youtube-icon2" src=""/><div id="youtube-player"></div>';
            ctrlq.style.cssText = 'width:150px;margin:2em auto;cursor:pointer;cursor:hand;display:none';
            ctrlq.onclick = toggleAudio;
            player = new YT.Player('youtube-player', {
                height: '0',
                width: '0',
                videoId: ctrlq.dataset.video,
                playerVars: {
                    autoplay: ctrlq.dataset.autoplay,
                    loop: ctrlq.dataset.loop,
                },
                events: {
                    'onReady': onPlayerReady,
                    'onStateChange': onPlayerStateChange
                }
            });
        }
        function togglePlayButton(play) {
            document.getElementById("youtube-icon2").src = play ? "https://i.imgur.com/IDzX9gL.png" : "https://i.imgur.com/quyUPXN.png";
        }
        function toggleAudio() {
            if (player.getPlayerState() == 1 || player.getPlayerState() == 3) {
                player.pauseVideo();
                togglePlayButton(false);
            } else {
                player.playVideo();
                togglePlayButton(true);
            }
        }
        function onPlayerReady(event) {
            player.setPlaybackQuality("small");
            document.getElementById("youtube-audio").style.display = "block";
            togglePlayButton(player.getPlayerState() !== 5);
        }
        function onPlayerStateChange(event) {
            if (event.data === 0) {
                togglePlayButton(false);
            }
        }
    </script>