Hi, Luxxeon!  Ok, i've started the tutorial, but right off the bat I'm running into some problems.  I'm at the stage where I need to extrude each face inwards, and then scale them smaller, as you show in the video.  My problem is with the scaling.  I extrude with individual, and then hit the S button to scale, but when I try to make the squares smaller, this happens...

Not sure you can tell what's going on here, but the scaling isn't doing what it does in your video.  In my case, it's just pushing all the squares deeper inside the tube all together, as if I was still extruding them.  I'm not sure what step I missed here. I'll keep looking over the notes in your vid, and try to find it while I wait for you to see this post.

Thanks again, Luxxeon. It's probably something stupid I'm overlooking here.  Sorry.