This is excellent, covers a lot of territory and I'm not even all the way through. Here are some of the experts who are providing information, I'm too lazy to detail all their impressive credentials but tried to indicate the thing they're most noted for:

Dr. Peter McCullough, cardiologist

Dr. Ryan Cole, pathologist

Dr. Harvey Risch, epidemiologist

Dr. Pierre Kory, pulmonary and critical care specialist

Dr. Richard Urso, opthalmologist and former chief of orbital oncology who ended up treating 600 Covid patients because there were no other doctors doing this where he lived

Dr. Christina Parks, cellular molecular biology; as an African-American scientist, she brings a unique perspective that most people are not even aware of, the predisposing mutations like sickle cell trait, etc. that can put people of African descent at much greater risk of adverse reactions from the vaccine

Dr. Mary Bowdin, ENT and respiratory specialist in Houston, who ended up treating massive numbers of Covid patients whose primary care physicians wouldn't

Dr. Harpel Mangat, general practitioner in Germantown MD who like others ended up treating massive numbers of Covid patients because other doctors weren't

Dr. Paul Marik. was Professor of Medicine and Chief of Pulmonary and Critical Care Medicine, treated ICU patients for 35 years until he was terminated

Dr. Aaron Kheriarte, psychiatrist, Chief of Ethics at the Unity Project, was Director of medical ethics program at University of California till fired over vaccine mandates (lawsuit ongoing)

Dr. Robert Malone, Physician and scientist for over 30 years, has worked as vaccinologist and clinical researcher; now Chief Medical Officer of the Unity Project, President of the 17k plus International Alliance of Physicians and Medical Scientists

Dr. David Wiseman, was top research bioscientist at J&J and now runs his own product R&D business

Dr. Jay Bhattacharya (taped presentation), one of the three authors of the Great Barrington Declaration (edit to correct spelling of his name)

Dr. Paul Alexander, clinical epidemiologist

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About the first 1 hour, 45 minutes is comprised of the opening statements from these experts, followed by the open discussion that begins with questions that Sen. Johnson compiled but will eventually include questions from the audience, etc. I'm only a little over 2 hours and 15 minutes in to a video that lasts almost 5 hours, trying to take notes with timestamps for future reference.

(edit to bold experts' names)