There are a number of different reasons you may be running into that are causing video playback issues. Internet connection, browser bandwidth, plug-ins/extensions are all factors that could be affecting video playback. There are a few things you can do to optimize your video playback experience.
1. Check your browser: try playing the video on an alternate internet browser (e.g. Google Chrome, Safari, Microsoft Edge and Firefox ), and see if the experience is improved.
2. Clear cache and cookies.If you need instructions to do so, click here.
3. Change the resolution on the video.