提供一个vue前端页面示例，样式使用elementui，页面包括光标悬停提示返回顶部的返回顶部组件、光标悬停放大的图片组件、还有一个光标悬停出现播放按钮的视频组件

以下是一个简单的Vue前端页面示例，样式使用element-ui库，包含光标悬停提示返回顶部的返回顶部组件、光标悬停放大的图片组件、以及一个光标悬停出现播放按钮的视频组件：

<template>
  <div>
    <back-to-top />
    <image-zoom />
    <video-play />
  </div>
</template>

<script>
import BackToTop from "@/components/BackToTop.vue";
import ImageZoom from "@/components/ImageZoom.vue";
import VideoPlay from "@/components/VideoPlay.vue";

export default {
  name: "ExamplePage",
  components: {
    BackToTop,
    ImageZoom,
    VideoPlay,
  },
};
</script>

<style>
/* 样式使用 element-ui 库 */
</style>

其中，`BackToTop` 组件实现了光标悬停提示返回顶部的功能，代码如下：

<template>
  <div class="back-to-top" v-show="visible" @click="backToTop">
    <el-tooltip content="返回顶部" placement="left">
      <i class="el-icon-arrow-up"></i>
    </el-tooltip>
  </div>
</template>

<script>
export default {
  name: "BackToTop",
  data() {
    return {
      visible: false,
    };
  },
  mounted() {
    window.addEventListener("scroll", this.handleScroll);
  },
  destroyed() {
    window.removeEventListener("scroll", this.handleScroll);
  },
  methods: {
    handleScroll() {
      const scrollTop =
        document.documentElement.scrollTop || document.body.scrollTop;
      this.visible = scrollTop > 0;
    },
    backToTop() {
      window.scrollTo({
        top: 0,
        behavior: "smooth",
      });
    },
  },
};
</script>

<style scoped>
.back-to-top {
  position: fixed;
  right: 50px;
  bottom: 50px;
  z-index: 999;
  font-size: 20px;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.3s;
}

.back-to-top:hover {
  opacity: 1;
}
</style>

`ImageZoom` 组件实现了光标悬停放大的图片组件功能，代码如下：

<template>
  <el-image
    class="image-zoom"
    :src="src"
    :fit="fit"
    :preview-src-list="previewSrcList"
    @mouseenter.native="showZoomIn"
    @mouseleave.native="hideZoomIn"
    ref="image"
  >
    <template #placeholder>
      <div class="image-placeholder">{{ placeholder }}</div>
    </template>
    <template #error>
      <div class="image-error">{{ error }}</div>
    </template>
    <div class="image-zoom-in" v-show="zoomInVisible">
      <i class="el-icon-zoom-in"></i>
    </div>
  </el-image>
</template>

<script>
export default {
  name: "ImageZoom",
  props: {
    src: {
      type: String,
      required: true,
    },
    fit: {
      type: String,
      default: "cover",
    },
    previewSrcList: {
      type: Array,
      default: () => [],
    },
    placeholder: {
      type: String,
      default: "加载中...",
    },
    error: {
      type: String,
      default: "加载失败",
    },
  },
  data() {
    return {
      zoomInVisible: false,
    };
  },
  methods: {
    showZoomIn() {
      this.zoomInVisible = true;
    },
    hideZoomIn() {
      this.zoomInVisible = false;
    },
  },
};
</script>

<style scoped>
.image-zoom {
  position: relative;
}

.image-placeholder,
.image-error {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  color: #ccc;
  font-size: 14px;
}

.image-zoom-in {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 20px;
  opacity: 0.6;
  transition: opacity 0.3s;
}

.image-zoom-in:hover {
  opacity: 1;
}
</style>

`VideoPlay` 组件实现了光标悬停出现播放按钮的视频组件功能，代码如下：

<template>
  <div class="video-play" @mouseenter.native="showPlayButton" @mouseleave.native="hidePlayButton">
    <el-video
      :src="src"
      :poster="poster"
      :controls="false"
      ref="video"
    >
      <div class="video-play-button" v-show="playButtonVisible" @click="play">
        <i class="el-icon-caret-right"></i>
      </div>
    </el-video>
  </div>
</template>

<script>
export default {
  name: "VideoPlay",
  props: {
    src: {
      type: String,
      required: true,
    },
    poster: {
      type: String,
      required: true,
    },
  },
  data() {
    return {
      playButtonVisible: false,
    };
  },
  methods: {
    showPlayButton() {
      this.playButtonVisible = true;
    },
    hidePlayButton() {
      this.playButtonVisible = false;
    },
    play() {
      this.$refs.video.play();
    },
  },
};
</script>

<style scoped>
.video-play {
  position: relative;
}

.video-play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 50px;
  opacity: 0.6;
  transition: opacity 0.3s;
  cursor: pointer;
}

.video-play-button:hover {
  opacity: 1;
}
</style>

以上是一个简单的Vue前端页面示例，其中包含了三个常用的组件。需要注意的是，这里只提供了基本的功能实现，具体样式和交互效果可以根据自己的需求进行调整。