Since it's only for blocking notes, and since I'm interpreting "Birds eye View" as a view 14 or 16 feet in the air <orthographic> as opposed to a straight down view < planview>, I'd say find yourself a standard security camera mount and use it to mount any old camcorder out it the
house, either from an
FOH posistion<
proscenium> or right to the grid <blackbox>. Now if you are going digital and want to record onto your laptop, check out the posts on here relating to "Video monitoring" of the stage. There have been several cameras and strategies discussed in the last few months.
Just as an aside, this is not a permissable activity in an Equity house. Recording of rehearsals or performances, without an expressed agreement between all parties,Equity, and the publishers of the play is strictly forbidden. That's my $.02 worth of Lawyering.