He has just added the letters A,B,E
To DR. Birx.
Very few YouTubers have anything worth researching.
The only one I can think of is Jim Watkins
For instance in his last video he dropped this:
PDF attached. Or download the bigger PDF from archive.org here:
https://archive.org/details/paganismsurvivin00lewi/page/n6/mode/2up