The first thing to do is to make sure your internet connection is working well. Open videos in other devices such as smart phone to make sure that your internet connection is working fine. Then reload the page and try again. The other thing which you can try is to clear all the cookies and cached files from your browser. 1. Under “Privacy” from settings, there is “clear browsing data” button, click on it. 2. Now select “Cookies” and “Cached” option and clear the browsing data for the last past hour, past day, past week etc. and click on “clear browsing data”. Also try to run video streaming sites in incognito mode so that the extensions are disabled. If you have installed plugins and extensions then they may interfere with your ability to stream videos.