This is the printhead from an Epson NX330. While I was tearing down the printer to get the printout out, I was amazed at just how much stuff goes into one of these printers, and then the fact that I bought it with ink for probably 50$ (when it was new many years ago). The last printhead that I looked at was a hybrid MEMS type, where in contrast this one is a thermal inkjet printer. The ink gets super heated for a fraction of a second and forms a tiny drop, which then is ejected towards the paper. In the video, as I tear back the layers starting from the top, you can see the reservoirs that hold ink ready to be heated. The inks approach the center of the printhead from either side, where two rows of tiny holes are. On the last layer is the rows of tiny heating elements used to heat the ink into drops.