Video like a background React - html

Question

I have a problem with setting video like a background. As you can see on picture, when I scroll at the bottom, my video is not ending before footer. It's displaying also after the footer. Image
Here is the part of code were I placed my video and btw, this video like a background needs to be only on this page.
return (
<>
<video src={videoBackground} autoPlay muted></video>
<Container style={{ padding: 0, margin: 0 }}>
<WrapperPage>
<WrapperContainer>
<Container maxWidth="sm">
<Box
sx={{
maxWidth: "100%",
my: 3,
textAlign: "center",
}}
>
<h1>
<div
className="wordSize animate__animated animate__bounceInDown"
style={{ fontSize: "6rem" }}
>
Blokaria
</div>
<div
className="animate__animated animate__bounceInUp wordSize"
style={{ fontSize: "2.5rem" }}
>
<div>Where we create unique value</div>
</div>
</h1>
<Typography></Typography>
</Box>
</Container>
{staniIbarVodo ? showData : ""}
<Container maxWidth="sm" sx={{ mt: 5, mb: 5, textAlign: "center" }}>
<Grid container spacing={4} direction="row" sx={{ my: 3 }}>
<Grid item xs={12} md={6}>
<Typography variant="h6" align="center" sx={{ mb: 2 }}>
{t("how-to-create-qr-code")}
</Typography>
<YoutubeEmbed embedId="1cz9q9OQ6Kg" />
<Typography component="legend">User reviews</Typography>
<Rating name="read-only" value={5} readOnly />
</Grid>
<Grid item xs={12} md={6}>
<Typography variant="h6" align="center" sx={{ mb: 2 }}>
{t("howToCreateNft")}
</Typography>
<YoutubeEmbed embedId="aYuXCImLVPQ" />
<Typography component="legend">User reviews</Typography>
<Rating name="read-only" value={4} readOnly />
</Grid>
</Grid>
</Container>
</WrapperContainer>
</WrapperPage>
</Container>
<video src={videoBackground} autoPlay muted></video>
</>
);
Here is the CSS:
video {
width: 100vw;
height: 100vh;
object-fit: cover;
position: fixed;
left: 0;
right: 0;
top: 0;
bottom: 0;
z-index: -1;
}
I really don't know what is the problem and if someone knows the solution, please help. Thank you!
Also I tried to set some static picture for background and everything is okay but this video makes me problem.