Problem:

User's wallet safety depends on their ability to keep their seed phrase safe, secret, and retrievable if/when they need to recover their wallet. However, the term 'seed phrase' isn't descriptive on its own, and often people don't read through our seedphrase flow to fully grasp the importance of it.

Acceptance criteria:

To help improve the comprehension of why seed phrase is important and how to keep it safe, we want to

• Change the naming to 'Secret Recovery phrase'
• Add a quick video explainer as an additional & more engaging learning medium in the onboarding flow of the app (also available after the user has onboarded):
• Don't let the video file make the app size (significantly) heavy such that it makes the app slow or run into storage limit issues.

Figma: https://www.figma.com/file/Di5k5DTvxDWGv5DtIhwMb8/secret-recovery-phrase?node-id=2%3A4739

Video: (with subtitles file) https://github.com/MetaMask/metamask-extension/tree/develop/app/images/videos/recovery-onboarding
https://drive.google.com/file/d/1wGnIPb7OJXB7UeXt7k52vJAI4WgSB3HV/view?usp=sharing

Out of scope (will add to another analytic story)

Include metric event so we can measure well how many people are viewing the video via mobile app during onboarding, and from settings (and can view this new metric in relation with how many people are completing the backup flow (effectiveness of the video))