Many thanks, whenifhow, for this thread!
And for all y’all who posted links to vids; copy em and save!
Regarding the "white light" on Hillary's podium....
Its an OLED flexible display film.
There is also pic of someone putting something, rectangular like a tape recorder, and plugging/wiring it in, into the podium long prior to the debate. Then it is removed AFTER the debate
BINGO...it's the OLED display control system