<video class="forvidos" autoplay src="{% static "video/1.mp4" %}"></video>
.forvidos{
position: relative;
height: 100vh;
display: block;
width: 100vw;
}
<style>
.unique {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
overflow: hidden;
}
.forvidos{
position: absolute;
height: (Подгони высоту);
display: block;
width: 100%;
}
</style>
<div class="unique">
<video class="forvidos" autoplay src="{% static "video/1.mp4" %}"></video>
</div>