diff --git a/xExtension-YouTube/configure.phtml b/xExtension-YouTube/configure.phtml
index 8828fe7..8895abc 100644
--- a/xExtension-YouTube/configure.phtml
+++ b/xExtension-YouTube/configure.phtml
@@ -6,6 +6,13 @@ declare(strict_types=1);
 	<input type="hidden" name="_csrf" value="<?php echo FreshRSS_Auth::csrfToken(); ?>" />
 	<div class="form-group">
 
+		<div class="group-controls">
+			<label class="checkbox" for="yt_autosize">
+				<input type="checkbox" id="yt_autosize" name="yt_autosize" value="1" <?php echo $this->isAutoSize() ? 'checked' : ''; ?>>
+				<?php echo _t('ext.yt_videos.autosize'); ?>
+			</label>
+		</div>
+
 		<label class="group-name" for="yt_height"><?php echo _t('ext.yt_videos.height'); ?></label>
 		<div class="group-controls">
 			<input type="number" id="yt_height" name="yt_height" value="<?php echo $this->getHeight(); ?>" min="50" data-leave-validation="1">
diff --git a/xExtension-YouTube/extension.php b/xExtension-YouTube/extension.php
index c8bec52..400b091 100644
--- a/xExtension-YouTube/extension.php
+++ b/xExtension-YouTube/extension.php
@@ -9,6 +9,10 @@
  */
 final class YouTubeExtension extends Minz_Extension
 {
+	/**
+	 * Whether we set the Youtube iframe to autosize
+	 */
+	private bool $autoSize = false;
 	/**
 	 * Video player width
 	 */
@@ -32,6 +36,8 @@ final class YouTubeExtension extends Minz_Extension
 	#[\Override]
 	public function init(): void
 	{
+		Minz_View::appendStyle($this->getFileUrl('style.css', 'css'));
+	
 		$this->registerHook('entry_before_display', [$this, 'embedYouTubeVideo']);
 		$this->registerHook('check_url_before_add', [self::class, 'convertYoutubeFeedUrl']);
 		$this->registerTranslates();
@@ -63,6 +69,11 @@ final class YouTubeExtension extends Minz_Extension
 			return;
 		}
 
+		$autoSize = FreshRSS_Context::userConf()->attributeBool('yt_autosize');
+		if ($autoSize !== null) {
+			$this->autoSize = $autoSize;
+		}
+
 		$width = FreshRSS_Context::userConf()->attributeInt('yt_player_width');
 		if ($width !== null) {
 			$this->width = $width;
@@ -84,6 +95,15 @@ final class YouTubeExtension extends Minz_Extension
 		}
 	}
 
+	/**
+	 * Returns whether this extension enables autosize for the YouTube player iframe.
+	 * You have to call loadConfigValues() before this one, otherwise you get default values.
+	 */
+	public function isAutoSize(): bool
+	{
+		return $this->autoSize;
+	}
+
 	/**
 	 * Returns the width in pixel for the YouTube player iframe.
 	 * You have to call loadConfigValues() before this one, otherwise you get default values.
@@ -181,7 +201,13 @@ final class YouTubeExtension extends Minz_Extension
 	{
 		$content = '';
 
-		$iframe = '<iframe class="youtube-plugin-video"
+		if ($this->autoSize) {
+			$class = "yt_autosize_true";
+		} else {
+			$class = "yt_autosize_false";
+		}
+
+		$iframe = '<iframe class="' . $class . '"
 				style="height: ' . $this->height . 'px; width: ' . $this->width . 'px;"
 				width="' . $this->width . '"
 				height="' . $this->height . '"
@@ -252,6 +278,7 @@ final class YouTubeExtension extends Minz_Extension
 		$this->registerTranslates();
 
 		if (Minz_Request::isPost()) {
+			FreshRSS_Context::userConf()->_attribute('yt_autosize', Minz_Request::paramBoolean('yt_autosize'));
 			FreshRSS_Context::userConf()->_attribute('yt_player_height', Minz_Request::paramInt('yt_height'));
 			FreshRSS_Context::userConf()->_attribute('yt_player_width', Minz_Request::paramInt('yt_width'));
 			FreshRSS_Context::userConf()->_attribute('yt_show_content', Minz_Request::paramBoolean('yt_show_content'));
diff --git a/xExtension-YouTube/i18n/de/ext.php b/xExtension-YouTube/i18n/de/ext.php
index e692670..35ca4ca 100644
--- a/xExtension-YouTube/i18n/de/ext.php
+++ b/xExtension-YouTube/i18n/de/ext.php
@@ -2,6 +2,7 @@
 
 return array(
 	'yt_videos' => array(
+		'autosize' => 'Autogröße des Players',
 		'height' => 'Höhe des Players',
 		'width' => 'Breite des Players',
 		'updates' => 'Die neueste Version des Plugins findest Du bei',
diff --git a/xExtension-YouTube/i18n/en/ext.php b/xExtension-YouTube/i18n/en/ext.php
index 6f37c02..234fc36 100644
--- a/xExtension-YouTube/i18n/en/ext.php
+++ b/xExtension-YouTube/i18n/en/ext.php
@@ -2,6 +2,7 @@
 
 return array(
 	'yt_videos' => array(
+		'autosize' => 'Player autosize',
 		'height' => 'Player height',
 		'width' => 'Player width',
 		'updates' => 'You can find the latest extension version at',
diff --git a/xExtension-YouTube/i18n/fr/ext.php b/xExtension-YouTube/i18n/fr/ext.php
index 3beee1b..50e8f57 100644
--- a/xExtension-YouTube/i18n/fr/ext.php
+++ b/xExtension-YouTube/i18n/fr/ext.php
@@ -2,6 +2,7 @@
 
 return array(
 	'yt_videos' => array(
+		'autosize' => 'Taille automatique du lecteur',
 		'height' => 'Hauteur du lecteur',
 		'width' => 'Largeur du lecteur',
 		'updates' => 'Vous pouvez trouver la dernière mise à jour de l’extension sur ',
diff --git a/xExtension-YouTube/i18n/tr/ext.php b/xExtension-YouTube/i18n/tr/ext.php
index a206d2f..4681ec8 100644
--- a/xExtension-YouTube/i18n/tr/ext.php
+++ b/xExtension-YouTube/i18n/tr/ext.php
@@ -2,6 +2,7 @@
 
 return array(
 	'yt_videos' => array(
+		'autosize' => 'Oynatıcı otomatik boyutlandırma',
 		'height' => 'Oynatıcı yükseklik',
 		'width' => 'Oynatıcı genişlik',
 		'updates' => 'En son uzantı sürümünü şu adreste bulabilirsiniz:',
diff --git a/xExtension-YouTube/static/style.css b/xExtension-YouTube/static/style.css
new file mode 100644
index 0000000..bec82a8
--- /dev/null
+++ b/xExtension-YouTube/static/style.css
@@ -0,0 +1,5 @@
+.yt_autosize_true {
+    height: 100%;
+    width:  100%;
+    aspect-ratio: 16 / 9;
+}
\ No newline at end of file