Hi Baahmed, thanks for letting us know and we are terribly sorry to hear that you are experiencing technical issues.
Please direct any support related issues to our support staff by tapping "support" from the left menu or by calling 855.483.7862 ext. 2 Monday-Friday 9am-6pm PT. Our support channels are a much faster way to resolve these type of issues.
However, just to see if I can help.. when you click on the video lessons ensure that you have pressed make available offline on the videos. The videos should work once they are loaded. If this doesn't work please contact the support staff so that they can better assist you!