Scan filesystem

Write a function that accepts a file path and a list of extensions as a parameter and returns a list of found video files including additional information which can be extracted from the Filesystem.

e.g.

```javascript
findVideoFiles(‘\\nas1\\series’, [‘avi’, ‘mp4’]);
```

```javascript
{
filepath: "\\nas1\\series\\south_park\\season_1\\sp_s1_e1.mp4"
series: "South Park",
season: 1,
episode: 1
},
...
```

We should also research if we can extract additional information from the video file itself. Requiring a specific file structure may be a problem for users.