Whole time I was watching this I was just amazed by the fact a sewing machine can do this with any reliability at all. Surely the designs that rely on the thread buckling a certain way are not as reliable? It seems like if a thread has any kind of irregularity that would cause it to bend in an unintended way the whole thing would fail. Not to mention that the mechanisms have to be so precise while moving at high speed.

Then after I watched it, I watched another video about how looms work, and it blew my mind even harder because they do something similar but with dozens of threads at once, and at a larger scale that requires a lot more power.

Mechanical engineering is amazing.