I agree the phrasing could use some clarification...I think his point is that the front center of older bikes was incredibly short, with longer chainstays in the rear. To be "centered" you had to be further back on the bike. What you're saying about locked arms and high position is absolutely true on any bike. I think the overarching point here is that old geo caused poor posture for spicy features and trails. Did some figure it out and make it work? Sure. Give anyone long enough on any apparatus and they'll find a way to excel at it. I think that arguably we've made it easier to be stable and aggressive with modern geo.One thing I disagree with on this second video is that the "arms locked hanging back" position isn't suited for old school geometry. That's the first thing you learn in "how to go OTB 101". It's just really poor technique born form ignorance and fear in the early days of mountain biking. I get on my old 26" bike from the mid 90's or my more modern trail bike I'm attacking a rolling drop in the same position, chest down arms bent pushing the front wheel down the drop. Because of the more forward bias weight distribution and much shorter wheelbase I do need to be further back on the 90's bike than the 2020's bike but the technique is the same. He says and I'm paraphrasing "if you ride with your arms locked like this you might like older geometry". In reality he should be saying "don't ride like this it's a terrible way to ride".