If you are not seeing the Download This Video button, please follow the steps from: Download This Video option does not appear
If you are getting the message "No videos to download on this page", please try this solution: 'No videos to download on this page'
I hope this helps. In case the problem persists, please explain what happens exactly when you try to download and include the Windows version and the browser you are using, so we can assist you further. The more information you provide, the better we'll be able to help you.