Here knock your socks off; but most I think will require a graduate degree into understand the chemistry and medical conditions. Alzhemer’s Scholarly articles

Youtube is more for how to change the oil in car or cook a beer can chicken. YouTube make money by lots of lots people visiting the site not one person interested in a medical condition.

As I suggested on another thread, I think it would be of great benefit to you on many levels to go to your public library and work with a reference librarian on what you are interested in.

Try the TED Talks , search for ‘dementia’, ‘deja vu’, and ‘alzheimer’.