Since it is possible to forecast per customer, per item variant, per country, etc, it is possible to apply different strategies of forecast in different markets per different items. You can also filter on items, of course, per different salespersons, etc.
This is what happens in the video
So you might have a market which is very important and where you need the forecast to be updated maybe even per week and other markets where you want the forecast to be updated only once every three months.
So this way it is possible to distinguish the very important forecast areas and get the forecast updated often just by importing it, adding the right filters, and then just updating that small bit of the forecast instead of having to work with very huge amount of forecast that you need to consolidate all the time.
So you can agree with the each salesperson that has responsibility for countries or customer, etc how you want to have a forecast updating strategy.