A class won't play or a video freezes during playback on the app

This sounds like a download problem - the video was not downloaded properly. It happens when there is a problem with the Internet connection during the download.

Please delete this video from your device and download it again. To delete the video find it in the Classes list, swipe left and tap Delete from Device. The previously downloaded video will then be deleted. You can download that same video again anytime you need it.