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add `<script src="https://unpkg.com/vuetify-video-parallax"></script>` after the `vuetify`
<!DOCTYPE html>
<html>
<head>
<link href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900" rel="stylesheet">
<link href="https://cdn.jsdelivr.net/npm/@mdi/font@6.x/css/materialdesignicons.min.css" rel="stylesheet">
<link href="https://cdn.jsdelivr.net/npm/vuetify@2.x/dist/vuetify.min.css" rel="stylesheet">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no, minimal-ui">
</head>
<body>
<div id="app">
<template>
<v-video-parallax
:src="src"
img="http://prcagrimex.co.th/en/wp-content/uploads/2014/04/dummy-image-green-e1398449160839-300x214.jpg"
height="600">
Some Html Here
</v-video-parallax>
</template>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue@2.x/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vuetify@2.x/dist/vuetify.js"></script>
<script src="https://unpkg.com/vuetify-video-parallax"></script>
<script>
new Vue({
data: () => ({
message: 'Row',
src: 'https://media.istockphoto.com/videos/the-couple-with-camping-backpacks-walking-to-the-mountain-top-slow-video-id1151597371',
}),
}).$mount('#app');
</script>
</body>
</html>Source:stackexchange.com