This Vimeo URL can only be embedded within moodle.org and moodle.com domains. If you are testing locally: You can temporarily change your OS hosts file by pointing the loopback IP (127.0.0.1) to moodle.org or moodle.com . OR You can create a virtual host with moodle.org  or moodle.com domains. Test Go to "Site administration" > "Plugins". Go to "Manage filters" in the "Filter" section. Ensure that "Multimedia plugins" is "On". Click on "Multimedia plugins" settings (on the right). Go to "Manage media player". Ensure that "Vimeo" is enabled. Create a course. On the new course: Click on "Turn editing on" / Enable "Edit mode" (master). Click on "Edit" on "Topic 1". Then click on "Edit topic" in the dropdown menu to edit the section. Using the Atto editor in the "Summary" field, insert or edit an audio/video file: Click on the "Insert media" icon. Select the "Video" tab. Example Vimeo URL https://vimeo.com/629106351/b75dc63af5 Click on the "Insert media" button. Click on "Save changes". Ensure  that the URL got converted to an embedded video in the course. Confirm that the embed video is playable. As an admin, enable "Mobile services": Site administration ► Mobile app ► Mobile settings Create a Token in the mobile app service for any user enrolled in the course where the video is Click on Site administration ► Plugins ► Web services ► Manage tokens Open the following URL in a browser in incognito mode, WS_TOKEN should be replaced with the token you created before: http://YOUR_MOODLE_SITE/media/player/vimeo/wsplayer.php?video=629106351&token=WS_TOKEN&h=b75dc63af5 Confirm that: You can play the video or you see a message indicating the video can't be played (it could happen because of the video restrictions) Inspect the previous page source code and confirm that: You see an iframe pointing to src="https://player.vimeo.com/video/629106351?h=b75dc63af5" NOTE : "Sorry Because of its privacy settings, this video cannot be played here." can be displayed, if the domain is not allowed to be embedded. (If you are using the example URL and your site domain does not match the domains that are allowed in the video).