LOL....,
So first place, the YouTube "testing" was an annecdotal firing demonstration,
not a test.
The fellow making the video used a bench but didn't do bench shooting..., they are NOT one in the same.
He mentions he doesn't do it much, and he's not very good at bench shooting..., so...,
His distance is 66 feet away (22 yards)..., BUT even in our modern times handgun combat 80% of the time is at 21 FEET or less (Source NYPD)
With nothing to suggest that handgun combat was different back in the cap-n-ball era, other than it being a lot slower at firing rates..., the test should be at 21 FEET a.k.a 7 Yards. Until we get a proper bench rest test, hopefully with the revolver secured on something solid, fired at 21 feet, we really can't say it's not accurate...
As for "period correct", that term is used a lot, but is often more widely used than it should be. There are actually four terms. These Are:
Documentary Piece, a replica of an item that is an identical or near identical copy of an extant artifact. Allowances are made for making the replica appear new and not showing the ravages of time.
Historically Correct, a replica of an item that is an approximation of an original artifact, without glaring errors visually detectable. (this standard may vary from person to person) Some would argue that because revolvers were cut down to make "pocket guns", that cutting down the 1858 Remington does not remove it from the category of HC, even though no known examples of that modification are currently known. The cylinder pin retention mechanism might disqualify it as HC, or the mechanism itself my be Historically Inspired (see below) Some, like myself, do not like the SLP Bess as offered by Pedersoli for use in the F&I, as it was not in production during that war, so it is not HC
Period Correct, similar to Historically Correct, in that the item may be a replica of an item that was known to have existed somewhere on Earth, so it's existence at X time period is not generally in dispute, but whether it was known in a specific location is perhaps debatable. Sometimes allowances are made for an item, like the SLP Bess in the F&I, that all of the SLP Bess characteristics were known during the F&I, and just because it was put into production a few years after the war doesn't disqualify it from being PC, even though it's not HC.
Historically Inspired, an item whose basic function, materials, and construction are not out the realm of the technology of the time period, but there is no mention of the item in historical records, nor do any extant examples exists, nor anything similar that is known to exist. The classic item in this category is the "bullet board" in the 18th century. A not so readily noticed item is the domed lid "corn boiler" made of copper..., which is dated to the 20th century.
LD