If videos are not playing there could be few reasons. To troubleshoot this issue check for the following.
- Are you connected to Classcloud?
- Are you currently using Google Chrome ?
- Were these videos pre-installed on the Classcloud?
1.If yes, then do a content sync on the Classcloud, After the Sync gets completed, check the videos.
If still you are not able to view videos please connect with out customer support team at firstname.lastname@example.org