We’re aware that some MP3 downloads are currently not working as expected and are actively working on a permanent fix. In the meantime, you can still get your MP3 by opening the Download menu on the video and clicking the last MP3 button option highlighted in the screenshot below.

UPDATE:

The fixes were just implemented. We are now running scripts to convert all older videos from last week to the new mp3 format. Please allow 48 hours for everything to be converted and download links will work correctly after this period.