--- a/src/pyams_media/zmi/templates/video-preview.pt	Mon Jul 09 11:43:41 2018 +0200
+++ b/src/pyams_media/zmi/templates/video-preview.pt	Mon Jul 09 13:42:20 2018 +0200
@@ -2,22 +2,22 @@
 	 data-ams-plugins="flowplayer"
 	 data-ams-plugin-flowplayer-async="false"
 	 data-ams-callback="PyAMS_media.initPlayer"
-	 tal:attributes="data-ams-plugin-flowplayer-src extension:resource_path('pyams_media.skin:flowplayer');
-					 data-ams-plugin-flowplayer-css extension:resource_path('pyams_media.skin:functional_css');
-					 data-ams-callback-source extension:resource_path('pyams_media.skin:pyams_media');">
+	 tal:attributes="data-ams-plugin-flowplayer-src tales:resource_path('pyams_media.skin:flowplayer');
+					 data-ams-plugin-flowplayer-css tales:resource_path('pyams_media.skin:functional_css');
+					 data-ams-callback-source tales:resource_path('pyams_media.skin:pyams_media');">
 	<video
-		tal:define="href extension:absolute_url(context);
-					thumbnails extension:thumbnails(context);
-					conversions extension:conversions(context);
+		tal:define="href tales:absolute_url(context);
+					thumbnails tales:thumbnails(context);
+					conversions tales:conversions(context);
 					size thumbnails.get_image_size();"
 		tal:attributes="poster string:${href}/++thumb++${size[0]}x${size[1]}.png?_=${view.timestamp}">
 		<tal:loop repeat="conversion conversions.get_conversions(order=('video/webm','video/mp4','video/x-flv'))">
 			<source type="video/mp4"
 					tal:define="media_width conversions.get_conversion_width(conversion.__name__);
-								video_type extension:video_type(conversion);"
+								video_type tales:video_type(conversion);"
 					tal:condition="video_type"
 					tal:attributes="type video_type;
-									src extension:absolute_url(conversion);
+									src tales:absolute_url(conversion);
 									media 'all and (max-width: {0}px)'.format(media_width) if media_width else None;" />
 		</tal:loop>
 	</video>