SmiCut has produced a video that explain the advantages with FourCut compared with the triangular threading insert.
SmiCut has several videos that will give you knowledge about thread milling.
One video shows the benefits of using the method of milling a thread.
Another video will show you ThreadBurr, the Solid Carbide Thread Mill from SmiCut that makes the threading and the deburring in the same operation.
At last you can see a half an hour seminar that was hold at the Scandinavian Technical Fair in Stockholm 2010. The presentation have english subtitels and gives a basic education about thread milling.
All videos can also be seen on YouTube.