Post new video endpoint

#### HTTP Method: `POST`

#### Route: `/api/videos`

#### Acceptance Criteria

- [ ] There is a `POST /api/videos` backend endpoint to facilitate adding videos to the database.
- [ ] The endpoint generates and attaches a unique ID to each newly added video.
- [ ] The endpoint accepts video data in JSON format (example provided).
- [ ] The endpoint responds with a JSON response that includes the generated id (example provided)