Old commercials for the Famicom in excellent quality
All but one featuring the square-button Famicom.
Watch the last one, it features an insane setting.
GAME KING Star Soldier Score Competition between Takahashi Meijin & Mouri Meijin
You may have seen the 8min excerpt on youtube (the one with 260k+ views), but this is the full 30min version, featuring the amazing intro and all the up and down of both competitors.
It's also in splendid quality while the 8min one is super-shitty.
Japanese documentary about the Famicom featuring various "children of the Famicom" like Hideo Kojima and Tetsuya Mizuguchi. I admit that I didn't understand much, but for any person who understands Japanese it must be an interesting watch.