The following videos explain concepts that help you learn various Gmail
developer features such as the REST API, email markup, and
Add-ons for your applications. Each video generally walks you
through a short sample app to help you quickly get started with a specific
feature.

## Introduction to the Gmail API

[Video](https://www.youtube.com/watch?v=UhdiQmS3kDs)

Why did Google create the Gmail API? This video gives developers a
history of programmatic access to email and the motivation for creating the
Gmail API. With the Gmail API, you can go beyond what
standard email protocols can do.

(Running time: 5:42)

## Revolutionize email access with the Gmail API

[Video](https://www.youtube.com/watch?v=L6hQCgxgzLI)

After a review of the Gmail API, this video digs into an intermediate
example that displays the subject line for chatty email threads (those with
three or more messages). Viewers not only get a walkthrough of the code but also
get a bonus US history lesson.

(Running time: 8:32)

## Modify your signature with the Gmail API

[Video](https://www.youtube.com/watch?v=kfeKF1zgwj0)

The Gmail API lets developers create apps that modify user settings.
This video walks you through an example of modifying [user
signatures](https://developers.google.com/workspace/gmail/api/guides/alias_and_signature_settings#managing_signatures).
Other settings the API can modify include email forwarding, vacation responder,
external access using IMAP/POP, and filters.

(Running time: 6:01)

*This feature is also described in the blog post ["Modifying email
signatures with the
Gmail API"](https://gsuite-developers.googleblog.com/2016/12/modifying-email-signatures-with-the-gmail-api.html).*

## Create great experiences with email markup

[Video](https://www.youtube.com/watch?v=7uQ87m9RB74)

Developers can use markup to add actions to emails, increasing user engagement.
This video shows how you can enhance your customers' experience by adding
[email markup](https://developers.google.com/workspace/gmail/markup) to the messages you're *already*
sending them.

(Running time: 4:41)

## Expedite expense reports with Gmail Add-ons

[Video](https://www.youtube.com/watch?v=9cDvkVCcIWE)

Add-ons let you extend Gmail as well as integrate
functionality from *your* app into Gmail's user interface. In
this video, learn about the [ExpenseIt! Gmail
Add-on](https://github.com/googleworkspace/gmail-add-on-codelab)
--- an app that helps working professionals process receipts directly from their
inbox into a spreadsheet, creating a single place to complete their expense
reports. Build the add-on piece-by-piece with its
corresponding [codelab](https://g.co/codelabs/gmail-add-ons).

(Running time: 5:18)

*This feature is also described in the blog post
["Gmail add-ons framework now available to all
developers"](https://developers.googleblog.com/en/gmail-add-ons-framework-now-available-to-all-developers/).*