i tried again and again by refreshing. but this a/b testing course video cant be played.

Hello Sonam, Thanks for reaching out! In order to help you with troubleshooting this issue, do you mind providing us with a couple of more details about the problem you have came across? Here's what would help: Have you installed any browser extensions that could prevent you from watching video lessons. Such browser extensions are "Privacy Badger" and "Hoxx Privacy VPN" for example. Do you use VPN at all? Have you tried using another browser? Have you checked your internet connection? In some cases poor internet connection may cause such an issue. A screenshot! Before providing us with a screenshot, please make sure to open the console in your browser and to take the screenshot after that. In order to open your console, press the "Ctrl" + "Shift" + "C" buttons. After that a new tab will appear from where you will have to select the "Console" section. After that please make sure to take the screenshot, by clicking the buttons "Win" + "PrtScr" and make sure that both your console and the video player are visible in the picture! Hope this helps! Please, feel free to contact us through the "Report a bug" button about any issues that you may be experiencing with accessing the video lessons. Best regards, The 365 Team