IIRC I read that that shot was hard matted in the camera. When the film ran in the intended 1.85 ratio there was no bar visible. When the 16mm and 8mm prints were made for TV and home the 4:3 ratio exposed the matted shot.
I haven’t seen any mention of the music score accompanying these cut or uncut scenes. Wouldn’t Universal have had to make changes in the music so as to avoid any jump cuts or lack of synchronization with the video? They couldn’t have just cut or restored parts of scenes without adjusting the music.
I’m confused about the term “edited-for-television ” as used use here. I used to have a 16mm print of the real “edited-for-television” version. In that one the shower scene stabbing lasts about two seconds. That’s how it first aired on TV. I watched it that way before I had the print.