I came across lectures by Professor Mal Horne of the Florey Institute in Australia. Each is quite long (about an hour), but I found them to be excellent round-ups of PD knowledge.
Finding the cause of PD
Medications in PD
Deep Brain Stimulation and Other Advanced Therapies
Non-Motor Problems
Treatment of Complications
Helping Yourself in PD
I hope you enjoy them as much as I did, and find them useful.
Dan