The OP did not mention screens, but I disagree on both fronts. For video, sure an AT screen has less gain than an opaque screen, but you don't need a super light canon for one either. I have no problems with this using a BenQ W6000. For audio, my mid-grade screen has about a 1 dB attenuation that is pretty even, so no EQ required.
They will be behind an acoustic screen.