An interesting video there. nice post.
I do, however, have a few problems with the design of the experiment.
Its only a short video, but you need to do multiple tests of each round, test various ranges and other materials.
The range tested here doesnt allow the projectile to get into its proper "torpedo" position so they just tumble through the material. this creates error from the rounds hitting the target from different angles each time.
I'm sure they deal with this in the commentary, but anyway i just thought i'd say.
it'll probably be revealed when the translation comes out , but i think the bit at the end compares tracer to normal ball rounds(the bit where the petrol/oil drum is shot into flames)