This video was hosted on Vidme, which is no longer in operation. However, you might find this video at one of these links:
ATN Looks at and Tears Down - Microlith Memory 4
January 1 2017
We tear down yet another vintage 70's calculator and become unsurprised that it has the Rockwell chip inside. Also IU have to unsolder the whole keyboard to put the keypad back after the video was done just so I could reassemble it.