https://www.youtube.com/watch?v=D3jZm1sPMDc
Above is the most interesting keris making video I have watched for a number of reasons.
Firstly it shows you some of the ceremony involved, offerings, full moon etc
Secondly most keris making vids I have seen show folding steel/nickel from factory whilst this vid shows them making the keris from raw materials taken from the ground.
Thirdly a technique is shown that I had never seen before in which the palmor material is put into a steel tube and both ends hammered down.
Fourthly and most interesting to me was the metals put into those tubes to make the pamor, meteorite and what looks like a gold chain are two things I picked out.
Using a tube solves many problems with using a material that does not readily forge easily in my mind.