Earlier quoted context omitted.
I believe knowingly disseminating incorrect results is wrong. This is a violation of fundamental academic standards; we would not tolerate it in any other scientific field. Do you disagree?
Do you think he's trying to poison the minds of young mathematicians? At the very least, you're raising ArXiV and YouTube to a standard they openly do not meet. Also, did you raise these points to him and he denied your evidence/proofs? Do you know someone who did and you're speaking for them?
It against the prevailing norms of scholarly communication to publish results with serious errors known to the author.
I agree YouTube does not have this policy. I still find incorrectly claiming a proof of RH on YouTube distasteful, for similar reasons.
I personally know a mathematician who has pointed out the mistakes to him. But also, Polson good enough at math himself that he should be aware of these points. I would criticize him just the same if he knowingly published false economics results.