Moved sample-media-file.json to src/assets, updated subtitle info with a new URL, and added a new sample-media-file.mp3.json for audio testing. These changes support improved handling and testing of both video and audio media in the VideoJSPlayer component.
Added a comprehensive sample-media-file.json for use with the video player. Updated VideoJSPlayer.jsx to support or utilize the new sample media file, likely for development or testing purposes.
Added a default audio poster image and updated VideoJSPlayer to use it when no poster_url is provided. Also refactored mock media data property names for consistency.
Reduced the number of subtitle entries in both Greek and English sample VTT files to only include the introduction and overview, removing detailed descriptions and additional lines for brevity.