CSS 可以實現(xiàn)視頻循環(huán)播放，以下是實現(xiàn)視頻循環(huán)播放的 CSS 代碼示例：

video {
width: 100%;
height: auto;
}
video::-webkit-media-controls-play-button,
video::-webkit-media-controls-start-playback-button {
display: none!important;
}
video {
pointer-events: none;
}
video:after {
pointer-events: auto;
content: "";
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
cursor: pointer;
}
video.autoplay {
display: block!important;
visibility: hidden!important;
}
video.autoplay:after {
display: none!important;
}
video.loop {
pointer-events: none;
}
video.loop:before {
content: "";
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
background-image: inherit;
background-size: cover;
background-position: center center;
animation: video-loop 10s linear infinite;
}
@keyframes video-loop {
to {
transform: scale(1.1);
}
}

以上 CSS 代碼可以實現(xiàn)視頻循環(huán)播放的功能，其中 video.autoplay 可以實現(xiàn)視頻自動播放，video.loop 可以實現(xiàn)視頻循環(huán)播放。