I'm not particularly fond of this guy but it is at least a workable idea.
As far as the penny wise pound foolish; if one isn't familiar with the term, google can be very informative. Be that as it may, it means that one is stingy with small or minor purchases but frivolous with large purchases, and I think maybe misapplied in this sence as there is no mention of how the cases came into your posession.
But that is beside the point of you have a batch of berdan cases. Can they be made serviceable? (yes) Is such effort of a value to you? (only you can decide that)
Like you, I'm not a fan of watching this guys videos. They can be almost painful at times, redundant, condescending and FAR too "Hillbilly-ish" for my liking (No offense to the Hillbilly folk amongst us, of which I am a guilty party), but the concept of how he achieves his decapping has merit.
As others have mentioned, decapping Berdan cases seem to be too much of a PITA for my money but you gotta do what you gotta do, I suppose.
Notwithstanding the overly labor intensive methodology involved, unless you are also going to mill out the raised portion of the case which forms the anvil, you'll need to find a source for the actual Berdan Primers as well.
I've read over the years that they ARE available but you cannot use the words "inexpensive" or "easily or readily obtained" in the same sentence, either.
That may not still be the case these days and I have no need to research to verify but for my money, time and effort I don't even bother outside of saving them for scrap value.
All that aside, I suppose if we were to find ourselves in a Grid Down, Fecal Matter striking the oscillating and air moving device situation, reusing Berdan cases MIGHT be of value. However, if you stockpile enough supplies of loaded ammo and/or reloading supplies for "regular" brass, it wouldn't be a major issue anyway. At least IMHO.
Overnout