Media-data (category)
| embed_oembed_html | Allows you to change cached oEmbed HTML when it is displayed. |
| getimagesize_mimes_to_exts | Allows you to add an image MIME type and its corresponding file extension. |
| image_editor_output_format | Allows changing the format in which the WordPress image editor saves processed images and generated sizes. |
| manage_media_columns | Allows you to change the list of registered columns in the Media table. |
| oembed_dataparse | Allows you to change the content (HTML) generated when URLs supported by WordPress's oEmbed format are embedded. The change occurs before caching. |
| upload_mimes | Allows adding/removing file types that can be uploaded to the site (file MIME types allowed for upload). |
| wp_editor_set_quality | Allows changing the default image compression quality based on its MIME type and dimensions. |
| wp_insert_attachment_data | Allows you to modify attachment (Media Library file) data before it is updated or added to the database. |