Summarize:

Use the following steps to download and install the official ESPN app for iPhone, iPad and Android phone's and tablets:  Open App Store on iPhone and iPad, or the Google Play Store on Android smartphones and tablets. Tap Search (iPhone only) Type "ESPN" in the search bar. Tap GET or Install next to the ESPN app. The ESPN app has a white icon with a red "E" logo.  You can tap the icon on your home screen or apps menu, or tap OPEN in the App Store or Google Play Store once it finishes downloading and installing. The first time you open the ESPN app, it may ask if you want to allow it to have access to your photos and media files, as well as location.  Tap Allow to continue. If you already have an account with ESPN, you can tap Log In and use the username or email address and password associated with your account to log in.  If you do not have an account, tap Sign Up and enter an email address and your preferred password and tap Sign Up to create an account. The first time you sign in to the ESPN app, it asks you to tap your favorite leagues (i.e. NFL, NHL, NBA, MLB, UFC, etc).  Tap the leagues you want to receive notifications about.  Then tap Next in the lower-right corner. Alternatively, you can tap Skip in the lower right corner if you don't wish to receive notifications about any leagues. Tap one of the leagues listed to the left to select a specific sports league.  Then tap the logo for your favorite teams.  Select as many teams as you want.  Tap Finish in the lower-right corner when you are done. It's at the bottom of the screen. It's next to an icon that resembles a 'Play' triangle. There are several videos of Live ESPN channels at the top of the page. You can also scroll down to pre-aired TV episodes and short videos.  You can also browse videos by sport or team. Content that has an "ESPN+" label on it requires an additional paid subscription to view. On Android, you can preview a video for a few minutes before having to sign in with your TV provider.  If you are allowed to preview the video without signing in, tap the blue button that says Sign In with TV Provider to sign in. Tap the company you receive live TV from.  This may be your satellite or cable provider (i.e. Xfinity, Verizon Fios, CenturyLink, DirecTV, Dish) or a live TV streaming service (i.e. Hulu +, YouTube TV, Sling TV). If you do not have a TV service provider, you can tap Get a TV Provider to view a list of live TV services you can sign up for.  These include internet streaming services and cable and satellite providers in your area. In some cases, the ESPN app may be able to detect your TV service provider through your wireless internet.  If not, enter the username and password associated with your TV service provider account to verify your television service provider subscription. If you have a smart TV that supports Smart Cast, you can tap the icon that resembles a TV screen with radio waves to cast the video to your TV.  It's in the upper-right corner of the app.
Download the official ESPN app. Open the ESPN app. Tap Sign Up or Log In. Tap your favorite leagues and tap Next. Tap your favorite teams and tap Finish. Tap the Watch  icon. Tap a video. Tap Sign In with TV Provider (Android only). Tap your TV provider. Enter your TV service provider account information. Tap  to cast to your smart TV (optional).