While the Internet Archive is a fantastic resource for accessibility, it is important to note that 2001: A Space Odyssey was filmed in Cinerama (super-widescreen).
If you want a digital file that works forever with no internet required, buy the 4K UHD Blu-ray. It includes a digital code that allows you to download a copy to your hard drive via services like Movies Anywhere. This is the closest you can legally get to an offline "Internet Archive" style file. 2001 A Space Odyssey Full WORK Movie Internet Archive
If the Internet Archive fails you (and it will), here are the legitimate digital repositories where you can watch a certified perfect version of 2001: A Space Odyssey online. While the Internet Archive is a fantastic resource
The silence of space in 2001 is a character. When you hear only breathing inside a space pod, followed by the sudden explosion of classical music, the effect is jarring. Many Archive rips compress audio to the point of distortion. The famous "Screamer" sequence (the psychedelic light show at the end) relies on a specific frequency range that low-quality MP3 audio cannot reproduce. This is the closest you can legally get