I normally lurk here but thought it might be helpful to have a couple of links. Dr. Immanual was not the only dcotor in that particular video nor is she the founder of the frontline doctors group. Dr. Simone Gold is the founder.
https://www.hospicepatients.org/white-paper-on-hcq-from-americasfrontlinedoctors-com-2020.2.pdf
https://thegoldopinion.com/bio