Store date created on new videos

[RbAvci]

From Full-Stack-Project-Assessment created by Dedekind561: CodeYourFuture#487

Acceptance criteria

• When a user adds a new video, store the date and time they posted it in the database.
• The date created value is displayed in the frontend

Guidance 🧭

This might require a change to your database schema - you should make sure you can deploy this change without breaking existing videos, the same way the rating system was done.

Example

Check this example implementation to see how this feature could be implemented.