additional material

[mg1075]

Not sure if or how these would fit into your list, but anyways:

Vitamin D for Covid, What’s the Catch? - DarkHorse Podcast Gruff Davies and Linda Benskin
https://www.youtube.com/watch?v=8LFkWiNP1wQ
(This one is fascinating!)

Over 200 Scientists & Doctors Call For Increased Vitamin D Use To Combat COVID-19
https://vitamindforall.org/letter.html

COVID-19 and Vitamin D | Association Between Vitamin D Deficiency and COVID-19
https://www.youtube.com/watch?v=cT1CaTv5-e4
Professor Zach Murphy (via Ninja Nerd)
(A thorough walk-through via whiteboard where the teacher talks about the studies done; but what is good about this one is how he describes complex cell-level biology topics in understandable terms.)

Dr. John Campbell:
Vitamin D in Israel
https://www.youtube.com/watch?v=w9h-XQm2qEY