Susan, that's quite a great job you did there! Thanks for the links.
In this day and age people that pass as royals can be easily verified. Maybe in other times before the internet it was much easier since the information was difficult to compile. These days the truth is just a few clicks away from anyone in the planet.
About the Von Zeitschels, I found this:
Person Page but so far the only mentions of him are about that tv show. Not much on his family or his claims to celebritydom. He reminds me of the embarrasment with another celebrity, Paris Hilton's ex-boyfriend Paris. Over here in the USA he was 'sold' for the public as a rich Greek heir and latter, after she got rid of him (or his family got rid of her?) he was unmasked as just another kid of that extended family and not the sole heir of the family fortune. It's all in what the TV wants to say to sell a character for ratings. Sometimes they lie, sometimes they stretch the importance of these people beyond their reality.
Speaking of fasle claimants, here is a link from Guy Stair Santy's site
related to usurpers, false claimants and royal imposters. It's quite a great reading and will sure help to realize some royal people on TV are not all they claim to be, or as Stair Santy put's it "...
of yet another freshly minted genealogy..." Scroll down to see the tactics some fantasy royals used in the past.