HITCHCOCK'S ... Rope ..... A single N.Y. apartment set filmed and edited so as to appear as a single continuous shot through the use of long takes.
Often thought to be one continuous shot, but it ain't.
ALfred' first technicolor film.
It was impossible to have a take longer than 10 minutes in 1950. A thousand foot magazine of 35 mm film would only last 10 minutes.
Now with electronic cinematography you can literally make a film all in one take.
See: "Russian Ark" It took 4 tries to do that.