The phrase "brief snippet" means a short and small part of something, like a small piece of information or a short moment from a video or text. Full definition
It also means that the lessons deserve sufficient time that several passages of some length and not only brief snippets can be read. (religion-online.org)
A prologue introduces us to the family in brief snippets of their lives. (markreviewsmovies.com)
A nice bonus is the inclusion of brief snippets from various members of the Irrational team peppered throughout the walkthrough, talking about the area you're in or a particular character or enemy. (wolfsgamingblog.com)