Here is the Jan fact check of the article from Jan which touted the study. I think the link to the actual study will work...
The Brazil study
The FLCCC story shared on Facebook links to
a study published on Jan. 15 in the scientific journal Cureus. Its authors, two of whom are members of the FLCCC, concluded that "regular use of ivermectin as a prophylactic agent was associated with significantly reduced COVID-19 infection, hospitalization, and mortality rates," based on an observational study of 159,561 residents ages 18 and over in Itajaí, Brazil.
According to the study, between July 7, 2020, and Dec. 2, 2020, 113,845 participants of a citywide program took the drug, while 45,716 did not. Those who took ivermectin caught COVID-19 at a rate of 3.7%, while those who did not had a 6.6% infection rate.
After adjusting for variables, the authors said, they found a 67% reduction in hospitalization rate and a 70% reduction in mortality rate for ivermectin users.
It sounds promising, but two experts not associated with the study pointed out serious research flaws, including leaving questions about whether those identified as having taken the ivermectin actually did as prescribed. They also raised questions about conflict of interest by some of its authors.
Concerns about methodology
Dr. Nikolas Wada, an epidemiologist with the Novel Coronavirus Research Compendium at Johns Hopkins, raised concerns about the study's uncertainty over who was "truly taking ivermectin and vice versa" and poor control for factors that may predispose someone to catch COVID-19, among other issues.
"My primary takeaway," Wada said, "is that this paper adds nearly nothing to the knowledge base regarding ivermectin and COVID-19, and certainly does not prove its effectiveness as a prophylaxis."
Ivermectin is not FDA-approved for use against COVID-19 and there’s no scientific consensus yet of its effectiveness in
www.politifact.com
After reading this factcheck, which I just discovered I'm not surprised that quack guy on you tube is touting the study but ignoring the Factcheck. Not clear if it's just the article on the study or the study itself that includes the Frontline doctors. But either way that's a huge conflict of interest, esp when it comes to Brazil where Frontline were the main advocates for Bolsonaro's policy in the first place...