How to make the video quality switch function?

Tell me how to make the function of switching video quality, I am trying to do a shot like this

/*Качество*/ /* function editQuality () { player.setPlaybackQuality('medium'); document.getElementById('quality').innerHTML = '480'; document.getElementById('quality').innerHTML = '720'; } */ function editQuality() { if (player.setPlaybackQuality() == 0) { document.getElementById('quality').innerHTML = '720'; } else { document.getElementById('quality').innerHTML = '480'; } } <div id="quality">Auto</div> <button id="qual" onclick="editQuality ();">Сменить качество на 480</button> <button id="qual" onclick="editQuality ();">Сменить качество на 720</button>