A timestamp is a way of recording the exact time when something happened. It is like a digital clock that shows you the specific moment an event occurred. Full definition
For long videos, provide timestamps of when certain questions / issues are discussed. (janefriedman.com)
The Persian calendar format will appear on your Lock screen, your taskbar clock, and on timestamps on files in File Explorer. (blogs.windows.com)
The date issue has also been problematic for EPUB files generated out of tools like Calibre that produce dates with timestamps in them. (safaribooksonline.com)