And love he's using a scrap of broken glass to do the final edging and burnishing on the soles!
No fancy stitching pony, either - just his bare feet!
KGG, sewing machine embroidery? Hmm...don't think so. That machine he's using looks like a really old domestic - maybe an old treadle machine that's had a motor put on it. Okay, maybe one of the machine experts here could take a look at it, and let us know what they think...it seems to have no problem sewing the straps, but the leather on those isn't very thick.
I went back and looked at that section of the video again, and I see a loose thread hanging off the end of one of the decorative pieces (3.40 on the video, and again at the very end of the video, when he's showing off his finished work.) I THINK it could be a crocheted pattern, done using fine yarn, then appliqued to the leather. The pattern looks like small circles knitted together. With the primitive sewing machine he has, that wouldn't be possible. So, maybe the women in the family do the decorative bits by crocheting or embroidering, and he attaches them to the leather.