Our videos are hosted and streamed from Vimeo. Try the following troubleshooting techniques outlined below. Also visit the Vimeo Help Centre for more advice. Refresh the page. Clear the cache on your web browser. Update your browser to the latest version (Chrome, Safari and Firefox are recommended. Internet Explorer is not recommended). Change the resolution to a lower setting in the video player: Click on the gear button in the bottom right corner of the video player Choose 720, 540 or as low as 360. A lower resolution should resolve problems. The default setting is auto, which is usually the highest resolution. If connection is slow or not buffering/streaming smoothly, pause the video and allow more of it to load before playing. This is indicated by a blue loading/progress bar at the bottom of the video. If you are able to load the entire video then you can take your class without any interruptions in the stream. Wait for your internet connection to become faster or reconnect to the server by rebooting your connection with your provider. This will help if your router is the issue. Upgrade the speed of your connection with your local internet provider.  Anything around 25mbps should stream high definition videos without any issue. At times internet connections are slow (speeds will vary from time to time and from place to place and depending on your connection speed and internet provider). It’s possible you are in a period when your provider is performing slowly. In this scenario, wait and try again later, or contact your provider if you are not happy.