Display video/audio sources

[hugoponthieu]

Implement the display of any video/audio source. This issue is linked with #16.
This component will be used to make video calls. The video will be draggable so the camera will not be fixed. The advantage of this is that we will not have to manage the size of different video sources.
Specification:

• display video from a local source
• display audio/audio from a remote source
• indicate the username of the source

This component will be low leveled and its purpose is to be used to implement both components for local feed and remote feeds. (feed = audio/video)

An example of this component is available here