What kind of a hand saw guide is being used in this video?

Question

^{Image from Youtube}

Go to about 1:30 in the video to see the saw guide.

I am helping my son build a pinewood derby car, and something like this would be helpful.

Answer 1

I do not know the specific make of that guide but it is known as a hand mitre saw.

For example, from here:

(The one in that image appears to resemble a vintage Stanley mitre box, maybe a Stanley 358.)

There are other styles of mitre guides and boxes, too, the most familiar probably being the little plastic box with angled slots in the sides.