Wooden hangers retail for around €1 here, and it's ~2.5x cheaper if you look at AliExpress. Note that both are retail, the wholesale prices are probably half of that. €19 for a hanger is ridiculously expensive, even if they're individually hand made. Granted it includes shipping, but even if shipping is 50% of the cost, it's still absurdly expensive.
She mentions in the video that the plastic pieces are injection moulded over the wire, that's a clear indication that it isn't all done by hand. This is very likely being manufactured in a factory in China, with a 1000-2000% markup. But it's got a great story attached to it, and that's what sells it.