Following is a transcript of the video. Narrator: If you look at Iron Man's first suit, the Mark 1, and compare it to the hero's nanotech suit from "Avengers: Endgame," a lot has changed.

[Techmaster], like probably a lot of us, was hugely inspired by the engineering wonder that is the Iron Man suit. So, like any good maker, he decided to build his own. [Techmaster’s] social ...