While this whole "who invented it first" argument is fascinating, the video does raise some interesting points. The dye image must be extremely dense, essentially opaque in fact. The highlights on the finished picture are not noticeably darkened by the negative image underlying them. For the second picture the guy does mention a difference, but it must be slight as it is not obvious on the video.
Which leads to the second point. For the second picture he skips the bleach, but puts it thru the fix. If the image isn't bleached, there should be no need to fix. More to the point, there is nothing to fix. After the first and color developers in a reversal process, all the silver halide has been reduced. So there is nothing left to be dissolved out by the fix. It would seem that this process could be done with just two steps, the first developer and the color developer.