Several JWST Community Lecture Series presentations that highlight NIRSpec functionality are available for viewing.
Lectures about NIRSpec
Parent article: NIRSpec Overview
The JWST Mission Office at the Space Telescope Science Institute organized a series of webinars aimed at training the astronomical community on how to use JWST. Recordings of the webinars are posted on the STScI webcast archive, and the presentation slides are also available for download. Several of these webinars have focused on NIRSpec features and capabilities.
NIRSpec Presentations in the JWST community lecture series:
In addition to the lecture series, relevant NIRSpec information has also been archived in:
JWST Proposing Tools of Interest to NIRSpec Users