The videos depend on the localization - as with the language and spelling.
Whether the ground floor is story 1 or story 0 depends on the local release according to the custom in the relevant country. For example, the USA version has no story 0, as we consider the ground floor the 1st floor. In most European countries, the ground floor is story 0 - their story 1 is what we would call the 2nd floor.
One of the forum moderators
AC 27 USA and earlier • macOS Ventura 13.6.9, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB