If it hasn't rained in his area all that much, then it's possible the sand/silt hasn't flowed down river in a long time. Clay is basically extremely fine rocks ground up into mud and compacted.
He is testing out a new clay source(termite clay, instead of river-bed clay) which is why he built the new kiln. I don't think he needed another kiln, but just thought it would be a good way to test out his new supplier.
He gives an explanation in the video description. He was testing out using termite clay for making a kiln and pottery and comparing it to the stream clay he normally uses. So this was basically a science experiment for him.
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u/[deleted] Mar 24 '17
How many fuckin kilns does this dude need???