CLA (Connecticut Library Association) President Alice Knapp writes a column for the association's newsletter each month. (I know I used to write one when I was President.) For the November issue, she talks about a short movie on the profession.
The movie is on the Internet Archive. I downloaded it, and took a look. While there are parts that are dated (the visuals, the lack of diversity, some of the technology), it is amazing how well done it is, and how well it presents librarians in a good light.