MDL-58065 media_videojs: Clarify langstring

media/player/videojs/lang/en/media_videojs.php

@@ -29,7 +29,7 @@
 $string['configaudiocssclass'] = 'A CSS class that will be added to the <audio> element.';
 $string['configaudioextensions'] = 'A comma-separated list of supported audio file extensions. VideoJS will try to use the browser\'s native video player when available, and fall back to a Flash player for other formats if Flash is supported by the browser and Flash fallback is enabled below.';
 $string['configlimitsize'] = 'If enabled, and width and height are not specified, the video will display with default width and height. Otherwise it will stretch to the maximum possible width.';
-$string['configrtmp'] = 'If enabled, links that start with rtmp:// will be handled by the plugin, irrespective of whether its extension is enabled in the supported extensions setting. Notice that you need to enable flash fallback for this to work.';
+$string['configrtmp'] = 'If enabled, links that start with rtmp:// will be handled by the plugin, irrespective of whether its extension is enabled in the supported extensions setting. Flash fallback must be enabled for RTMP to work.';
 $string['configvideocssclass'] = 'A CSS class that will be added to the <video> element. For example, the CSS class "vjs-big-play-centered" will place the play button in the middle. For details, including how to set a custom skin, see docs.videojs.com.';
 $string['configvideoextensions'] = 'A comma-separated list of supported video file extensions. VideoJS will try to use the browser\'s native video player when available, and fall back to a Flash player for other formats if Flash is supported by the browser and Flash fallback is enabled below.';
 $string['configyoutube'] = 'Use VideoJS to play YouTube videos. Note that YouTube playlists are not yet supported by VideoJS.';