A trailer, and not a great deal else. Some posts need a paragraph of setup explaining what the thing is and why it exists; this one does not. There is a video, it runs as long as it runs, and it does the explaining better than any amount of writing about it could. Part 1 itself comes later; this is the advance notice.
So press play. If it works on you, you will know soon enough, and if it does not, you have lost less time than you would have spent reading a description of it. Either way, that is the whole post.