看效果，我只设置了夜间模式的视频

后台：argon主题选项 – 页脚

<video
src="您的视频路径" /*日常视频*/
class="bg-video bg-video-day"
autoplay=""
loop="loop"
muted=""
></video>
<video
src="https://diy.451263.com/wp-content/uploads/2024/08/index1.mp4" /*夜间视频*/
class="bg-video bg-video-night"
autoplay=""
loop="loop"
muted=""
></video>
<style>
video.bg-video {
position: fixed;
z-index: -1;
left: 0;
right: 0;
top: 0;
bottom: 0;
width: 100vw;
height: 100vh;
object-fit: cover;
pointer-events: none;
}
html.darkmode video.bg-video.bg-video-day {
opacity: 0;
}
html.darkmode video.bg-video.bg-video-night {
opacity: 1;
}
video.bg-video.bg-video-day {
opacity: 1;
}
video.bg-video.bg-video-night {
opacity: 0;
}
#banner,
#banner .shape {
background: transparent !important;
}
* {
font-family: "Comfortaa", "Open Sans", -apple-system, system-ui,
BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial,
"PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimSun, sans-serif;
}
</style>
 
<script
src="https://api.gcxstudio.cn/odometer/odometer.min.js"
integrity="sha256-65R1G5irU1VT+k8L4coqgd3saSvO/Wufson/w+v2Idw="
crossorigin="anonymous"
></script>