I found this great classic on the 37 signals blog. Like one of the commenters says: it seems like nothing has changed in the meantime. UNIX is still as productive and the challenges they were facing still haven’t disappeared.
Another way to watch this video is as an introduction into UNIX. I especially like the pipeling part.
“The UNIX System: Making Computers More Productive”, from 1982. Brian Kernighan, Dennis Ritchie, and Ken Thompson talk about what UNIX is, how to use it, and show off some live coding too. Thanks to Tony Arcieri for sharing this!