Changing the default object embed sizes?

This is what I crafted to override the defaults, I set a default media width, choose an aspect ratio (16:9) and then replace the video shortcode output.

$defaultMediaWidth = 960;

if ( ! isset( $content_width ) ) {
  $content_width = $defaultMediaWidth;
}
add_filter( 'embed_defaults', 'bigger_embed_size');

function bigger_embed_size()
{
  global $content_width;
  $width = $content_width;
  // aspect ratio 16:9
  $r1 = 16;
  $r2 = 9;
  $r = $width / $r1;
  $height = $r * $r2;

  return array( 'width' => $width, 'height' => $height );
}

function EMP_video_shortcode_override(
  $output="",
  $atts = [],
  $video = '',
  $post_id = 0,
  $library = ''
){
  $defaults = wp_embed_defaults();
  $searchfor = [
    'width="' . $atts['width'] . '"',
    'width: ' . $atts['width'] . 'px;',
    'height="' . $atts['height'] . '"'
  ];
  $replaceto = [
    'width="' . $defaults['width'] . '"',
    'width:' . $defaults['width'] . 'px;',
    'height="' . $defaults['height'] . '"'
  ];
  return str_ireplace( $searchfor, $replaceto, $output );
}
add_filter('wp_video_shortcode', 'EMP_video_shortcode_override', 10 , 5);