public function __construct() {
    $host      = urlencode( home_url() );
    $providers = array(
      '#https?://((m|www)\.)?youtube\.com/watch.*#i' => array( 'https://www.youtube.com/oembed', true ),
      '#https?://((m|www)\.)?youtube\.com/playlist.*#i' => array( 'https://www.youtube.com/oembed', true ),
      '#https?://((m|www)\.)?youtube\.com/shorts/*#i' => array( 'https://www.youtube.com/oembed', true ),
      '#https?://youtu\.be/.*#i'                     => array( 'https://www.youtube.com/oembed', true ),
      '#https?://(.+\.)?vimeo\.com/.*#i'             => array( 'https://vimeo.com/api/oembed.{format}', true ),
      '#https?://(www\.)?dailymotion\.com/.*#i'      => array( 'https://www.dailymotion.com/services/oembed', true ),
      '#https?://dai\.ly/.*#i'                       => array( 'https://www.dailymotion.com/services/oembed', true ),
      '#https?://(www\.)?flickr\.com/.*#i'           => array( 'https://www.flickr.com/services/oembed/', true ),
      '#https?://flic\.kr/.*#i'                      => array( 'https://www.flickr.com/services/oembed/', true ),
      '#https?://(.+\.)?smugmug\.com/.*#i'           => array( 'https://api.smugmug.com/services/oembed/', true ),
      '#https?://(www\.)?scribd\.com/(doc|document)/.*#i' => array( 'https://www.scribd.com/services/oembed', true ),
      '#https?://wordpress\.tv/.*#i'                 => array( 'https://wordpress.tv/oembed/', true ),
      '#https?://(.+\.)?polldaddy\.com/.*#i'         => array( 'https://api.crowdsignal.com/oembed', true ),
      '#https?://poll\.fm/.*#i'                      => array( 'https://api.crowdsignal.com/oembed', true ),
      '#https?://(.+\.)?survey\.fm/.*#i'             => array( 'https://api.crowdsignal.com/oembed', true ),
      '#https?://(www\.)?twitter\.com/\w{1,15}/status(es)?/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
      '#https?://(www\.)?twitter\.com/\w{1,15}$#i'   => array( 'https://publish.twitter.com/oembed', true ),
      '#https?://(www\.)?twitter\.com/\w{1,15}/likes$#i' => array( 'https://publish.twitter.com/oembed', true ),
      '#https?://(www\.)?twitter\.com/\w{1,15}/lists/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
      '#https?://(www\.)?twitter\.com/\w{1,15}/timelines/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
      '#https?://(www\.)?twitter\.com/i/moments/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
      '#https?://(www\.)?soundcloud\.com/.*#i'       => array( 'https://soundcloud.com/oembed', true ),
      '#https?://(.+?\.)?slideshare\.net/.*#i'       => array( 'https://www.slideshare.net/api/oembed/2', true ),
      '#https?://(open|play)\.spotify\.com/.*#i'     => array( 'https://embed.spotify.com/oembed/', true ),
      '#https?://(.+\.)?imgur\.com/.*#i'             => array( 'https://api.imgur.com/oembed', true ),
      '#https?://(www\.)?issuu\.com/.+/docs/.+#i'    => array( 'https://issuu.com/oembed_wp', true ),
      '#https?://(www\.)?mixcloud\.com/.*#i'         => array( 'https://www.mixcloud.com/oembed', true ),
      '#https?://(www\.|embed\.)?ted\.com/talks/.*#i' => array( 'https://www.ted.com/services/v1/oembed.{format}', true ),
      '#https?://(www\.)?(animoto|video214)\.com/play/.*#i' => array( 'https://animoto.com/oembeds/create', true ),
      '#https?://(.+)\.tumblr\.com/post/.*#i'        => array( 'https://www.tumblr.com/oembed/1.0', true ),
      '#https?://(www\.)?kickstarter\.com/projects/.*#i' => array( 'https://www.kickstarter.com/services/oembed', true ),
      '#https?://kck\.st/.*#i'                       => array( 'https://www.kickstarter.com/services/oembed', true ),
      '#https?://cloudup\.com/.*#i'                  => array( 'https://cloudup.com/oembed', true ),
      '#https?://(www\.)?reverbnation\.com/.*#i'     => array( 'https://www.reverbnation.com/oembed', true ),
      '#https?://videopress\.com/v/.*#'              => array( 'https://public-api.wordpress.com/oembed/?for=' . $host, true ),
      '#https?://(www\.)?reddit\.com/r/[^/]+/comments/.*#i' => array( 'https://www.reddit.com/oembed', true ),
      '#https?://(www\.)?speakerdeck\.com/.*#i'      => array( 'https://speakerdeck.com/oembed.{format}', true ),
      '#https?://(www\.)?screencast\.com/.*#i'       => array( 'https://api.screencast.com/external/oembed', true ),
      '#https?://([a-z0-9-]+\.)?amazon\.(com|com\.mx|com\.br|ca)/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ),
      '#https?://([a-z0-9-]+\.)?amazon\.(co\.uk|de|fr|it|es|in|nl|ru)/.*#i' => array( 'https://read.amazon.co.uk/kp/api/oembed', true ),
      '#https?://([a-z0-9-]+\.)?amazon\.(co\.jp|com\.au)/.*#i' => array( 'https://read.amazon.com.au/kp/api/oembed', true ),
      '#https?://([a-z0-9-]+\.)?amazon\.cn/.*#i'     => array( 'https://read.amazon.cn/kp/api/oembed', true ),
      '#https?://(www\.)?a\.co/.*#i'                 => array( 'https://read.amazon.com/kp/api/oembed', true ),
      '#https?://(www\.)?amzn\.to/.*#i'              => array( 'https://read.amazon.com/kp/api/oembed', true ),
      '#https?://(www\.)?amzn\.eu/.*#i'              => array( 'https://read.amazon.co.uk/kp/api/oembed', true ),
      '#https?://(www\.)?amzn\.in/.*#i'              => array( 'https://read.amazon.in/kp/api/oembed', true ),
      '#https?://(www\.)?amzn\.asia/.*#i'            => array( 'https://read.amazon.com.au/kp/api/oembed', true ),
      '#https?://(www\.)?z\.cn/.*#i'                 => array( 'https://read.amazon.cn/kp/api/oembed', true ),
      '#https?://www\.someecards\.com/.+-cards/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ),
      '#https?://www\.someecards\.com/usercards/viewcard/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ),
      '#https?://some\.ly\/.+#i'                     => array( 'https://www.someecards.com/v2/oembed/', true ),
      '#https?://(www\.)?tiktok\.com/.*/video/.*#i'  => array( 'https://www.tiktok.com/oembed', true ),
      '#https?://([a-z]{2}|www)\.pinterest\.com(\.(au|mx))?/.*#i' => array( 'https://www.pinterest.com/oembed.json', true ),
      '#https?://(www\.)?wolframcloud\.com/obj/.+#i' => array( 'https://www.wolframcloud.com/oembed', true ),
    );

    if ( ! empty( self::$early_providers['add'] ) ) {
      foreach ( self::$early_providers['add'] as $format => $data ) {
        $providers[ $format ] = $data;
      }
    }

    if ( ! empty( self::$early_providers['remove'] ) ) {
      foreach ( self::$early_providers['remove'] as $format ) {
        unset( $providers[ $format ] );
      }
    }

    self::$early_providers = array();

    
/**
 * Filters the list of sanctioned oEmbed providers.
 *
 * Since WordPress 4.4, oEmbed discovery is enabled for all users and allows embedding of sanitized
 * iframes. The providers in this list are sanctioned, meaning they are trusted and allowed to
 * embed any content, such as iframes, videos, JavaScript, and arbitrary HTML.
 *
 * Supported providers:
 *
 * |   Provider   |                     Flavor                |  Since  |
 * | ------------ | ----------------------------------------- | ------- |
 * | Dailymotion  | dailymotion.com                           | 2.9.0   |
 * | Flickr       | flickr.com                                | 2.9.0   |
 * | Scribd       | scribd.com                                | 2.9.0   |
 * | Vimeo        | vimeo.com                                 | 2.9.0   |
 * | WordPress.tv | wordpress.tv                              | 2.9.0   |
 * | YouTube      | youtube.com/watch                         | 2.9.0   |
 * | Crowdsignal  | polldaddy.com                             | 3.0.0   |
 * | SmugMug      | smugmug.com                               | 3.0.0   |
 * | YouTube      | youtu.be                                  | 3.0.0   |
 * | Twitter      | twitter.com                               | 3.4.0   |
 * | Slideshare   | slideshare.net                            | 3.5.0   |
 * | SoundCloud   | soundcloud.com                            | 3.5.0   |
 * | Dailymotion  | dai.ly                                    | 3.6.0   |
 * | Flickr       | flic.kr                                   | 3.6.0   |
 * | Spotify      | spotify.com                               | 3.6.0   |
 * | Imgur        | imgur.com                                 | 3.9.0   |