I watched the Isenhour video last night, and just finished watching the one with Mr. Hayes. I only watched each video once, so might catch some things upon subsequent viewings that I didn't the first time. I'm not trying to be a critic, only conveying my first impressions.
I think the video with Mr. Hayes does a much better job of actually showing the stopping power of the braking system. Perhaps it is the camera angle, or distance from the lens, but even though the Isenhour tape is on steeper slopes, it, for me, seems harder to really see what the brakes are doing.
That said, I think it is obvious in both videos that the brakes do work. I just feel the Hayes video does a better job of presenting it to your audience.
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