In the video they specifically talk about a platform for building on, and there is mention of this find contracting conclusions about the nomadic nature of “folks” at the time. Both indicate they went straight to the abode idea.

The youngest of children will start assembling logs near shore when swimming at a lake. The crossing of the logs would help stabilize them so crossing would be safer and dry, which is critical in transporting some goods. The raft is more consistent with existing evidence, but less compelling to the modern world which expects homes to have floors.