I think it's really cool to make a presentation with your hypothesis.
I just about jumped out of my chair, too
lol
It would be much stronger if you added the references into the presentation (not just as a list but with the thought process of how they connect), so as to better explain how you came to this conclusion.
Maybe keep the slides you have as the opening, then go on to explain how it would all work to create the outcome of low blood volume (the flow chart was nice but it didn't explain to me how it worked). (You might also cite some references such that PWC's have low blood volume, because we can safely assume the YouTube audience is largely ignorant of the pathology of ME/CFS.)
Consider in-text citations (Rodriguez-Soriano) with an end-list of References.