html点击div播放视频,CSS2 video点击中间播放按钮播放视频代码

HTML代码：

<div class="video-container">
  <video src="video.mp4"></video>
  <div class="play-btn"></div>
</div>

CSS2代码：

.video-container {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
}

.video-container video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.5);
  cursor: pointer;
  z-index: 1;
}

.play-btn:before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 0;
  height: 0;
  border-top: 15px solid transparent;
  border-bottom: 15px solid transparent;
  border-left: 25px solid white;
}

.play-btn:hover {
  background-color: rgba(0, 0, 0, 0.7);
}

.play-btn:hover:before {
  border-left: 25px solid black;
}

.video-container video:focus {
  outline: none;
}

.play-btn:focus {
  outline: none;
}

.video-container video:not(:focus):not(:hover) + .play-btn {
  display: block;
}

.video-container video:not(:focus):not(:hover) {
  pointer-events: none;
}

.play-btn:focus + video,
.play-btn:hover + video {
  cursor: pointer;
  pointer-events: auto;
}

.play-btn:focus + video:focus,
.play-btn:hover + video:focus {
  outline: none;
}

.play-btn:focus:before,
.play-btn:hover:before {
  border-left: 25px solid black;
}

这段代码实现了点击 `div` 播放视频，以及点击中间的播放按钮播放视频的功能。视频播放器使用的是 HTML5 自带的 `video` 标签。CSS2 实现了视频容器的自适应大小，以及播放按钮的样式和交互效果。请注意，CSS3 有更多的功能和特性，可以让这段代码更加简洁和优美。