Add support for Libsyn

Their oEmbed implementation works: https://oembed.libsyn.com/?url=https://oembed.libsyn.com/embed?item_id=26035914

{
  "version": 1,
  "type": "rich",
  "provider_name": "Libsyn",
  "provider_url": "https://www.libsyn.com",
  "height": 90,
  "width": 600,
  "title": "Talking Drupal #388 - Valhalla Content Hub",
  "description": "Today we are talking about Valhalla Content Hub with Shane Thomas. For show notes visit: www.talkingDrupal.com/388  Topics  Joining Netlify Changes at Gatsby What is a content hub How does that differ from a content repo What is Valhalla How does it work Data stitching with GraphQL Can you massage / normalize data Benefits Privacy Production examples How is it structured Do you have to use Gatsby Integrations with Drupal Timing Cost How to sign up   Resources  Valhalla   Guests Shane Thomas - www.codekarate.com/ @smthomas3  Hosts Nic Laflin - www.nLighteneddevelopment.com @nicxvan John Picozzi - www.epam.com @johnpicozzi Jacob Rockowitz - www.jrockowitz.com @jrockowitz  MOTW  Correspondent Martin Anderson-Clutz - @mandclu Entity Share You configure one site to be the Server that provides the entities, and content types or bundles will be available, and in which languages. ",
  "author_name": "Talking Drupal",
  "author_url": "http://www.talkingdrupal.com",
  "html": "<iframe title=\"Libsyn Player\" style=\"border: none\" src=\"//html5-player.libsyn.com/embed/episode/id/26035914/height/90/theme/custom/thumbnail/yes/direction/forward/render-playlist/no/custom-color/88AA3C/\" height=\"90\" width=\"600\" scrolling=\"no\"  allowfullscreen webkitallowfullscreen mozallowfullscreen oallowfullscreen msallowfullscreen></iframe>",
  "thumbnail_url": "https://assets.libsyn.com/secure/item/26035914"
}

What is the 'Provider name' for your custom provider? Based on the response from the provider, it'll need to be 'Libsyn' (case sensitive). See #3298738: Document that provider_name should match the one return by the oEmbed endpoint → for details.

Thank you for replying! I missed your response.

Using the json response you showed me I attached a screenshot of my config and unfortunately it's still not working, I'm not sure what I am missing.

I am using this url in the url field of the media entity: https://oembed.libsyn.com/embed?item_id=26035914

I get the following error: The provided URL does not represent a valid oEmbed resource.

Missed screenshot.

See \Drupal\media\OEmbed\ResourceFetcher::createResource():

  protected function createResource(array $data, $url) {
    $data += [
      'title' => NULL,
      'author_name' => NULL,
      'author_url' => NULL,
      'provider_name' => NULL,
      'cache_age' => NULL,
      'thumbnail_url' => NULL,
      'thumbnail_width' => NULL,
      'thumbnail_height' => NULL,
      'width' => NULL,
      'height' => NULL,
      'url' => NULL,
      'html' => NULL,
      'version' => NULL,
    ];

    if ($data['version'] !== '1.0') { // <--- HERE
      throw new ResourceException("Resource version must be '1.0'", $url, $data);
    }

Version must be "1.0".

Now take a look at the response from the provider:

{
  "version": 1, <---- HERE
  "type": "rich",
  "provider_name": "Libsyn",
  "provider_url": "https://www.libsyn.com",
  "height": 90,
  "width": 600,

Version is "1", not "1.0".

Now, take a look at https://oembed.com/ at "2.3.4. Response parameters"

Responses can specify a resource type, such as photo or video. Each type has specific parameters associated with it. The following response parameters are valid for all response types:

type (required)
     The resource type. Valid values, along with value-specific parameters, are described below.
version (required)
     The oEmbed version number. This must be 1.0.

Conclusion: The provider's response is invalid.

You could write a pretty simple custom module to change the version from "1" to "1.0".

my_module.service.yml:

services:
  media.oembed.resource_fetcher:
    class: Drupal\my_module\OEmbed\ResourceFetcher
    arguments: ['@http_client', '@media.oembed.provider_repository', '@cache.default']

my_module/src/OEmbed/ResourceFetcher.php:

namespace Drupal\my_module\OEmbed;

use Drupal\media\OEmbed\ResourceFetcher as CoreResourceFetcher;

/**
 * Fetches and caches oEmbed resources.
 */
class ResourceFetcher extends CoreResourceFetcher {

  /**
   * {@inheritdoc}
   */
  protected function createResource(array $data, $url) {
    if ($data'provider_name' == 'Libsyn') {
      $data['version'] = '1.0';
    }
    return parent::createResource($data, $url)
  }

}