[Video Editing] ffmpeg executable requirement

[Brannydonowt]

I've been looking at automatically generating borders for video content posted to the instagram page. However, due to the use of the ffmpeg library (which uses .exe's on Windows) - I am currently unable to elegantly implement this on multiple platforms.

For now, I will simply disable this feature by default and allow any user to enable it should they wish.

For the time being I won't be providing any additional support to make this feature work platforms other than windows.