Easy to drill out if one is defective, but hard to know whether one is defective, before or after use. I would expect the relative hardness of the woods to matter.
Beech is fairly hard, and "compressed beech" is probably harder. If there's any other treatment/infusion to keep it compressed, it would be even harder (and may compensate for defects in the wood grain).
Not sure I'd trust it as the sole fastener for the use shown in the video (fasten 2x4 as table leg, fasten corners of a bedframe), but I probably wouldn't trust a metal brad for that either. To keep a real joint from slipping, though, it ought to work fine.