Imported lesson won't play in playlist

I have noticed recently that when I import a lesson from YouTube and subsequently add it to my playlist that the audio won’t play. When I go to the lesson the video will play, but I most often listen to lessons in my playlist while I am doing other tasks like mowing the lawn. Does anyone know why this is happening and how I can fix it?

Hi David,

I think it is likely that the extension is not grabbing the audio for the lesson - does the lesson itself have audio (separate from just playing the video)?