I have been doing some searching my self for what type of tip Dave was using in this episode and I really don't think the well hakko types BCM are it. When he puts it at the camera I believe you could see an actual hole in the tip, not just a concave surface.
Here are all the names that different solder iron companies use that could be what he is using that I could find doing some research online. Again I dont think the BCM is what he is using.
bucket, flow, spoon, bevel with indent or Shape BCM/CM from Hakko.