Add play feature for audio and video

[louies0623]

[probonopd]

This is a matter of finding and using appropriate thumbnailers for those sorts of files...

[louies0623]

I mean it is the function that can be played on the icon.

[probonopd]

Something similar to that would need to be implemented in Filer indeed, but would most likely introduce QtMultimedia as a dependency, which iirc draws in Gstreamer. This is a fat and undesired dependency, so I am hesitant to implement this.

[louies0623]

Then don't add this function, if it is too bloated.