Here is a short video on the subject of l-dopa induced dyskinesia: https://youtu.be/bwg7W7sJdHI

In actuality it was more likely that his medication caused the movement seen during the interview. Parkinson’s actually causes rigidity as opposed to the dramatic involuntary movements that people sometimes associated with the condition. The medication improves movement but also causes excess movement as well as tardive dyskinesia which are involuntary movements and tics. It’s all degrees of risk vs. reward when deciding if a medication is worth taking. The whole controversy was based on a misunderstanding of the disease and the effects of the medications.