add basic OGV video support

[nodiscc]

• work on Video support #46
• lightbox not supported yet, videos are just linked from the gallery page

This can easily be extended to other video formats, just add filetypes to the Other filetypes section, and symlink their thumbnail (eg. filetype_MKV.png) to to filetype_OGV.png

It would be cool to have videos rendered in the lightbox, but this needs more work and there are current plans to change the lightbox implementation, so I just added basic functionality.

[nodiscc]

Note that it seems possible to generate thumbnails for videos, using php and ffmpeg, see https://stackoverflow.com/questions/25096630/mp4-video-thumbnail-create-using-php-gd, https://github.com/PHP-FFMpeg/PHP-FFMpeg/.

I don't know if this is desirable though (CPU/IO load? Availability of the php-ffmpeg library? Complexity?). I'm fine with just icons for the time being.

Any feedback on this pull request is welcome.

[tmos]

Great, I merge this :)
As you said, once the lightbox changed, it will probably be possible to add an html5

Thanks for the pull :)

[nodiscc]

thanks @tmos

I'd like to add support for other video types (common formats supported by in-browser player). Maybe common audio formats should be supported too? This way minigal would be a simple multimedia gallery (got the idea from this app)

Is this change welcome?

[tmos]

I'm ok with this, listing more files shouldn't be a problem, as far as you add icons with it :)