Wavester, Um... with all due respect... The Opinel is a pretty unforgiving knife if you don't understand how it is to be used and adjusted. It's one thing for people in France to understand this, as it's almost a National knife and there's a deep culture there around the Opinel and the how-tos are discussed as a part of the lore in France. In this light, it's understandable how somebody in the US could buy an Opinel and not understand it at all. That certainly described my first experiences with the knife.
But where's the fault? With the knife or the the American who doesn't understand the knife?
I'm glad I stuck with the Opinel. It reveals it's value only after a lot of use and after a lot of experience. Some things I've learned not discussed in your YouTube review...
1) The joint needs to be adjusted to your liking. Flat head screwdriver twisted in the joint well will loosen it. Pliers on the inner ring (with outer lock ring removed) will tighten, as will peening the pin.
2) The joint needs to be lubricated and sealed to resist swelling. I prefer wax.
3) "Quality" includes quality of design. The blade grind will out slice and out cut any of the blades of the other knives you showed in pretty much any material but particularly in vegetables and wood. It took a few years of side by each testing to understand how amazing the convex grind is. A paper test of the factory edge is not going to reveal this. 5 lbs of potatoes and a dozen feather sticks will.
4) The joint is tougher than any of the knives you showed. Once you learn to tune the lock ring with a file, the knife will be impervious to blade rock or wobble. You'll need to abuse the knife to the point of breaking either the wooden handle itself (possible on the 8, unlikely on the 9, unheard of on the 10 for mortals) or break the blade in a vice to believe this. But the joint won't fail like nearly all other locking knives. Nor will it fail when clogged with sand. Bury all the knives in your review (including the Opinel) and then use them. The Opinel will still be functional.
5) The ergonomics of the Opinel handle is something that you should live with for a year to learn to appreciate. Try it side by each with those other knives. It's especially good for wood working.
6) As the for the blade breaking, you'd be shocked how tough it is to break it. Some reading here...
http://www.bladeforums.com/forums/showthread.php/1097460-Opinel-Pass-Around-amp-Walk-About
Again... I totally understand how you could be unimpressed with the Opinel out of the box. It is literally a foreign knife unlike any other you've ever owned. And that's the take-away I got from your video. You've obviously never owned anything like it and don't understand how to use it or tune it.
My recommendation is that you read up on the Opinel and learn more about it. It would be interesting to see you re-review it in a year or two.