Cool project with a clean layout and neat little illustrations.
If you were taking suggestions:
* First video should be somewhat interesting and relevant to the topic, I felt that for a video named "Introduction" it was mostly promotions for other products/the "premium" versions/etc.
* Having three animating progress bars on desktop for each step is a little distracting. There's one in the video embed, one green progress bar below the video, and another green loading bar on the left.