Family History on the LDS Media App

https://www.lds.org/pages/mobileapps/media-library-app?lang=eng

The LDS Media App is available for both iOS and Android devices. You can download the app to your smartphone or tablet or iPad from the Apple App Store or the Google Play store for free. The LDS Media App page on LDS.org (see above) has links to Guides for both versions of the app. Quoting from the webpage:

Wherever you teach, the LDS Media Library app gives you complete and searchable access to the Church media library. Complement Sunday lessons, Family Home Evenings, or missionary discussions with easy-to-find videos, images, and music content.

The resources on the LDS Media App can also be downloaded for use without an internet connection. Items are downloaded automatically so they can be used for lessons and other presentations. One very important point is that the videos of conference talks or other videos can be trimmed down to play only the portion you want to present. Cable adapters can also connect your device directly to a monitor, TV or projector for use in a class.

You will be surprised at what you might find for use in family history classes or for talks about family history. A search for media will result in dozens of images and videos.