如何实现带有播放/暂停按钮的视频播放器，而不是在颤动中浮动动作按钮？

<div id="video-container">
  <video id="video-player" src="video.mp4"></video>
  <button id="play-pause-button">播放/暂停</button>
</div>

#video-container {
  position: relative;
  width: 500px;
  height: 300px;
}

#video-player {
  width: 100%;
  height: 100%;
}

#play-pause-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

var video = document.getElementById('video-player');
var button = document.getElementById('play-pause-button');

button.addEventListener('click', function() {
  if (video.paused) {
    video.play();
    button.textContent = '暂停';
  } else {
    video.pause();
    button.textContent = '播放';
  }
});