app/assets/images/admin/video-preview.svg
<svg height="250" width="250" xmlns="http://www.w3.org/2000/svg">
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<path d="m155 110h-10v-10h10m0 30h-10v-10h10m0 30h-10v-10h10m-50-30h-10v-10h10m0 30h-10v-10h10m0 30h-10v-10h10m50-60v10h-10v-10h-40v10h-10v-10h-10v90h10v-10h10v10h40v-10h10v10h10v-90z" fill="#808080" stroke-width="5"/>
</svg>