Video size and border radius using a shortcode

How can I remove the style attribute from the video tag?

I embedded a video on the front page using the video shortcode and applied a border-radius to it with CSS. It looks good.

I modified the video shortcode a bit in functions.php:

add_filter( 'wp_video_shortcode', function( $output ) {

    $output = str_replace( "video", "video muted playsinline autoplay loop", $output );
    return $output;

});

The CSS:

#video-246-1_html5{
pointer-events: none !important;
border-radius: 20px !important;
background: #f4f4f4;
}

The problem:

On mobile I want the video width to be 200px. When I shrink the video to 200px with CSS, it loses the border-radius and the edges become sharp again.

I've tried everything that I've thought of. I also noticed the video tag has a

style="width= X; height: X;"

-attribute, and that correlates with the border-radius.

So basically, how can I remove the style attribute from the video tag? (or shrink the video some other way for mobile devices while maintaining 20px border radius)

Link to page: Webite