The National Endowment for the Humanities is offering a portal with video guides on using and searching Chronicling America, the Historic American Newspapers database from the Library of Congress and NEH.
Although it's designed for teachers and students, the "What is Chronicling America?" site"has a lot to offer genealogists. The site houses introductory videos on using the database, curated links for searching, and an ever-growing guide to individual state newspaper partner's podcasts, videos, and blogs" that can help extend your family resources to partner libraries and archives.
The Using and Searching videos are available at the NEH portal for the newspaper database. The overview video is available above.