xpl/pages/index/video.vue

<template>
	<view class="center"><image src="../../static/img/start.gif" mode=""></image></view>
</template>

<script>
export default {
	onLoad() {
		setTimeout(() => {
			uni.switchTab({
				url: '/pages/index/index'
			});
		}, 2500);
	}
};
</script>

<style lang="scss">
.center {
	width: 100%;
	height: 100vh;
	image {
		width: 100%;
		height: 100%;
	}
}
</style>