In this video

The video begins by contrasting the installation of the first stair tread, which is cut flush with the skirt and later covered by a newel post, with subsequent treads. The focus shifts to explaining the concept of return nosing, where a separate piece of wood is added to the tread's edge to provide a finished look when it extends beyond the skirt board. The presenter illustrates how this nosing piece fits onto the tread, emphasizing that the overhang of the return nosing will match the overhang at the front of the tread.