Take this one:
- No clear explanation of the problem to solve. Could have given an example or something to hammer out what is an arithmetic progression of 3 numbers. - No detail about the actual form of the previous bound and the new one. - Not much detail about the actual technique. I get that it become very technical very quickly. But that is the actual job of a science/math journalist to distill this. "They used a well know technique of increasing density, etc.". If it is well know, why not try to describe how it works.
I wonder what someone like 3blue1brown would make of this.