There may be a few reasons for this issue.
- Check your bandwidth: Check to make sure your internet connection is working and can handle streaming videos. Most Khan Academy videos require less bandwidth than live-action content, but we still suggest 1.5 Mbps bandwidth per device playing standard-definition video.
- Check that your browser is up-to-date: If neither of those are issues, check that you are using a web browser supported by Khan Academy. Whichever browser you choose, you may want to upgrade to the most recent version. A technical director at one school district who had reported problems with watching videos using Internet Explorer has informed us that Installing or Upgrading to IE 11 resolved his district's problems.
- International Problems: Finally, YouTube is currently blocked in China and Iran. However, you should be able to watch our videos from China as Khan Academy uses a different video player to show the instructional videos. You may be able to access the "KA Lite" site from Iran instead of our full site https://learningequality.org/ka-lite/.
- Other: If none of the above is your problem, please submit a helpdesk ticket by following the instructions on this page
Last updated September 22, 2017