Thanks for finding these videos: The rounding off of the tip is nowhere near as obvious as I remembered it, but playing around with the stop at 0.49 on the second video you can occasionally see the real condition of the tip, which looks to me slightly rounded, not jagged broken, by 1/16": Sorry about the exaggeration... The exposed metal is very hard to see in this video quality because they set up this blinding reflective board behind a black-painted knife, so what you see as a point is actually the black paint of the knife coming to a point... The later condition of the knife is irrelevant, since the point could have been brought back.
Also the steel magazine might have worsened the point, but it would look square broken not rounded: To break the quillion earlier means they use so much unrealistic force that the comparative result could very well be accurate on a complicated object like the rifle magazine: I'll concede the video doesn't definitively proves a cheat.
The video's conclusion on the snap cuts are wrong, because they are simply wacking flat objects with the edges flat...: A real test would involve a dual motion of a tip prick followed by a slicing cut, once the point is inserted, and this on a soft and sharply rounded target...: They would have had to seriously damage the dagger's point to make it fail to vastly out-perform the Tanto on "real" tip slicing...: I would say that on this they are misleading, but not in a way that is cheating.
Thanks again for finding the videos: I had been looking for them for a while, trying "Cold Steel Tanto vs"... No luck
Gaston