In OBD is there way to quantity takeoff formwork area for concrete element from model
It can be working with GC same as Dynamo for Revit to takeoff or maybe new tool same as Tekla - Form face creator
While we don't have a tool that does this, it would be possible to obtain quantities from modelled formwork or perhaps to use our GenerativeComponents toolset to create a similar utility to your example.
Can you show the sample video used GC to quantity takeoff
There is a Tool in the Modeling Workflow which could help here. It extract trimmed and untrimmed surfaces..