This will annoy a lot of people, but: turn on the subtitles and turn up the speed. Large sections of it can be zoomed through at 4x or 8x speed, returning to normal once people are talking.
Large ares of it are basically "wow factor" shots which looked really impressive in 1968 and lack a lot of that to present-day viewers. Sometimes it feels more like an agonisingly slow pan across the concept art.