Ad Hominem, Abusive
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Attacking the arguer instead of the argument.
Show
"The proposal comes from a convicted fraudster — reject it." The proposal's math doesn't know its author.
Watch for
Near-miss: when someone offers testimony rather than argument, credibility is the evidence — character attacks on witnesses are on-topic.