SMEustace, your suggestions would be great on the Students & Novices board, and I'm sure you did not mean to offend. However, I think after 30 years of equity stage management, loebtmc knows what she needs for her book style.
Loebtmc, from the looks of the profile, yes, there is video that's integral to the performance. There is no book, all spoken parts are video of interviews with Sondheim, interspersed with live musical numbers. The original production used 64 different projection screens. A local company around here did a production of it that was much simpler. (I think I've found a valid email address for her, I'll PM it over to you.)
There appears to be a piano/vocal version in the materials offered by MTI. From the looks of the song selection most of them are solos or duets that would suffice with libretto only, but there's a large group medley from Into the woods/Little night music/Sunday at the end of Act I that might require the manuscript.