That's one thing I'm very wary about when I use the Milton Keynes Redways. The Redways are about as wide as that cyclepath, if not, wider, but can be overgrown. Even whe they're not overgrown, you get blind bends, just like that one.
The trouble is, as is very well demonstrated in that video, that instead of everyone keeping left, there's no guarantee that any oncoming cyclist will keep left, right, centre, or weave from left to right. There could also be pedstrians taking up the width of the path too.
I think that there was enough room for them both to pass safely. Who to blame? I don't think the chap Clandy was following was too clever. Veering to the right before the bend, then to the left to take the bend. But I reckon the one coming the other way seemed worse. I got the impression he wasn't paying attention. Looking at Clandy's video, you could see a fair way around the bend from where Clandy was as the video closed. I had something similar the other day. Someone coming around a bend towards me, not really paying attention. I saw her coming and stopped before the bend and put my foot down. If I was paying as little attention as she was, then we'd have hit each other.
I think that there is a lot of the mentality that cyclepaths are always safe to cycle on, so you don't need to pay attention to what you are doing and can use it as if it was a footpath, not needing to keep left as you would on a road. I find that the Milton Keynes Redways are a very good way of sharpening up my skills for riding within a good safety margin. You really don't know what is coming around the next corner. They can be very hazardous at times.