More prominent weakness in the temporal muscle than the frontalis does not indicate UMN facial weakness. The temporal muscle is innervated by the trigeminal nerve, not the facial nerve, so it doesn't fit the facial nerve upper face sparing rule. To be more accurate, say inferior hemifacial muscles. Otherwise spot on and quite impressive analysis.
There seems to be a bit mislabelling of Right Parasagittal chain FP2-F4 as Right Temporal chain. Its a wonderful course indeed but being a student of EEG at a very early stage of career i keep on confusing this representation also. so just wanted to clarify with you. Its exactly at time 1:14 sec of video lecture. Thanks for recording wonderful educational series Prof. Jeremy
at 7:43, you mentioned there is clearly muscle activity going on in the left hemisphere. How can you tell? What are the characteristics of muscle activity in EEG? Thank you