Speaking as an old-skool "get out with a day pack and explore raw countryside" biker (which, BTW, emtb-ing has expanded and enabled massively in terms of distances and terrain capability), YT videos of those in-the-woods "flow" trails and their near-cousins bike park jump trails, to me, have started to look identical to each other.
Although there's nothing wrong with fairground rides per se and I'm not trying to diss them, I think that that's exactly what they are.
They're so distant from anything that could be described as "mountain biking" that the activity should really be called "Flow Biking" as a matter of course, don't you think?
Discuss.
I get it. my experience has been as follows.
riding 20+ years, when I started there were no real sculpted trails where I was, trail centres were a new thing and I went to Coed Y Brenin and Aston Hill in the early 2000's but the trails were still pretty 'natural' as I remember them, rarely a sculpted berm to rail etc. so my experience or riding is the same as you, take a large backpack and clear off for a huge ride.
so when I bought my first ebike about 18 months ago, I had taken a long time off to play rugby and I thought everything would be the same.
so I bought the bike and rode the local forest and the Brecon Beacons, all natural stuff but I started watching youtube riders and wondered what it would be like so I went to Cwm Rhaeadr which is a red trail designed and made by Rowan Sorrel (bike park Wales) and I didnt enjoy it, it felt really weird in a way that I couldnt describe, perhaps I just felt that I was restricted to one line on singletrack when I was used to taking any route I liked in the natural terrain..
anyway, fast forward a bit and I gave it another go and enjoyed it way more, I really wondered why and I think its the bikes.
the bikes are so much more capable than the last one I bought in 2002 and this means that to feel as endangered as I did before, I had to ride harder stuff, which means, getting it into bike parks and trails designed for them.
so basically, on my current bike im a far faster (not better) rider than I was before and then you need to find more challenging trails or its simply a boring ride.
bikes have changed so it makes sense that mountain biking itself would change..
blah blah blah