Video embedded via API in Moodle (Panopto plugin) plays audio only, blank screen video
When we embed a video in an assignment in Moodle using the Panopto Plugin for the Atto editor the embedded video will only show a blank screen. However, the video plays and you can hear the audio for the presentation.
If you click on the icon to go to the full video hosted at the Panopto site both audio and video will play.
This is only happening for some videos and I cannot recreate when testing with newly created video.
Can you tell me what may be causing this?
Thanks for your help.