You can access the videos by going to the “Subjects” tab on the navigation bar and selecting a subject of your choice.
If you are a new user, you will need to choose “Subjects” from the navigation bar. Then, select “Our Store” and choose the subjects you are searching for. Likewise, select “Try for Free” and choose “Earth Plan” for free introductory videos.
If you want to upgrade the plans, you may choose the “Moon Plan” and get access to the premium content with access to all the chapters.
You can open any video by clicking on the video thumbnail.