Video interactivity

[JaimeFlorian27]

As a user, I'd like to be able to interact with my reference video through the tool, instead of trimming through text controls, doing it through a slider would be much better.

Acceptance criteria:

1. User can interact with the video through a video player UI.
2. User can trim the video through a slider that describes the start and end position for the video.
3. The video player has a clear UI:

• Video seeking.
• Video play/pause.
• Volume controls.