There was no video like you describe produced for this product yet. So it didn't go anywhere, it just wasn't produced yet. I think that was probably the source of confusion. The video tutorials for our other products were mostly produced after release and over time. Since form builder is new and still in the first version, all of the additional training tutorials that might exist in the future have simply not been created yet.
We appreciate your feedback on areas where you are getting stuck and what the topics for those videos might include to assist you in the future. For now, ask direct questions here and we will do our best to answer them.