I’ve already seen those videos. The vise tests should be enlightening, if one was not aware of the facts beforehand – and quality counts – but that vise he made is remarkable! But nobody should be abusing their vise like he did!
I will never need a better heavy vise, than the one I have now (and the smaller one it replaced). It’s old and not entirely perfect but it will outlast me. I would have both on the bench if I had sufficient space…
There are also a couple of very small vises around, which work perfectly adequately within their size constraints, Then there is the old (original aluminium type) B & D workmate. Horses for courses as usual.