The player is initially built for the smallest imaginable screen of our users. This makes it suitable for the mobile phone, as well as for all the larger type of screens like desktops. In addition, it is designed as game controller, where you can operate extra buttons with your left and right thumb. For example, when you open the left menu, you will see various buttons appear in which you can determine the subtitles, the background noise and the speed of videos. If you use the right side, you open a kind of "pause menu" in which you temporarily pause the player and, for example, access settings. Both the left and right buttons are currently being redesigned, as a result of tests outcomes from first experiments with the current Blockchain Minor student groups. One of the strengths of the player is that it is continuously tested and iterated on the basis of points of improvement submitted by students and other users. As for the main screen, you currently see three areas. A screen at the top left to play the video, the slides of the video below and a note field on the right. Soon the literature and an overview of the lesson structure will be added, which are now tucked away as an option in the pause menu. The lesson structure allows you to easily switch between the micro-clips and possibly compile your own route, the literature is fully integrated in the player and, in addition to the reading material, also directly links to all sources used.