When sites are using the core Media library to embed videos via Oembed, a YouTube video added with the core Media module and rendered via oEmbed will produce an outer iframe that includes a title attribute, but renders an inner iframe that does not include the title attribute.
This is described more fully at https://www.drupal.org/project/drupal/issues/3085545 →
While the name of module, iframe_title_filter, indicates its original focus of solely providing a text format filter to provide the missing title attribute for any iframe inserted into a WYSIWYG, if the goal of the module is to fix missing title attributes on iframes when possible (rather than ONLY in WYSIWYGs), we should consider fixing this via this module, at least until Drupal core provides its own fix.
1. Enable media and media_library
2. Add a field of type "Media" to a node type, set to allow media of type remote_video.
3. Add a node populating the media field with a YouTube video (https://www.youtube.com/watch?v=iyjtK8jPdjM)
4. View the node. The wrapping iframe contains a title attribute, but the interior iframe does not.
function iframe_title_filter_preprocess_media_oembed_iframe(array &$variables) {
/** @var \Drupal\media\OEmbed\Resource $resource */
$resource = $variables['resource'];
$media = $variables['media'];
$html_dom = Html::load($media);
$iframes = $html_dom->getElementsByTagName('iframe');
foreach ($iframes as $iframe) {
if (!$iframe->hasAttribute('title')) {
$title = $resource->getTitle() ?? "Embedded content from " . $resource->getProvider()->getName();
$iframe->setAttribute('title', $title);
}
}
$variables['media'] = Html::serialize($html_dom);
}
Closed: outdated
1.0
Code
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.
Since no further reports of this problem on the YouTube end have arrived in the last 2 years, I feel it is in the best interest of tidying-up to mark this issue as closed. In the words of Marie Kondo, "Visible mess helps distract us from the true source of the disorder."