I would love getting one of those replicas by the company in the vid. It would be a hoot.
Sometimes it's a worry buying the cheapest offering on the market, but this past summer one Richard Thoday broke the 134 y.o. penny-farthing record for riding LEJoG (Land's End to John o'Groats, the longest road ride in Great Britain) on a UDC Mk4. I'm inclined to think the machines are okay.