Seen that vid a few times. Multiple assumptions targeted at an uninformed audience. Checking bristle softness by flattening down on a table isn't really a comparison.
The biggest assumption, based on the barber's requirements to us as little product as possible and contain his costs, is that getting the most lather out of a brush is the best gauge of its quality and performance. Having enough lather is important, but simply getting more shaves per bottle isn't proof of that. Shave cream is one of the cheaper consumables in DE shaving anyhow, and I'd prefer to use a bot more of the good stuff than stinge out. But this vid targets joe public, who already knows he's getting dacked and wedgied by Gillette.
I've tried the cream sampler and it's ok. Minty, not unlike proraso, but I don't think it's as good. No matter what brush you use.