1. You can select from the tutorials and courses listed under the Catalog menu. When you select a tutorial or course, first you are able to look at a very short preview which is showing you the tips or nails which will be prepared in the selected video. In addition you can read some introduction about the given nail decoration.
3. When you purchased a video, you can open it from My courses menu. The first video is again the short preview, but either clicking on the small grey arrow on the right hand side of the video, or scrolling down, chosing the second video right after the Preview video, you will be able to look at the tutorial or course you bought.