The download link is not working. I found a version that works here https://ffmpeg.org/download.html#build-mac

On animation export, you can check transparency, but the result is a black background even with sky and ground unchecked in styles. Is this a bug? I want to pull small animated 3D videos into Flash, but I need transparency so I can put them on top of other objects.

@whaat said:

This plugin is a work in progress. There is much functionality yet to be added but it is still quite useful in it's current state so I am releasing it.

Installation:

1. Copy to SketchUp/Plugins folder

Usage:

1. The plugin will create a context menu called 'UVTools'

I put the UVtools.rb file in Macintosh HD/Library/Application Support/Google Sketchup 6/SketchUp/Plugins
I also tried Users/myname/Library/Application Support/Google Sketchup 6/SketchUp/Plugins

But it no contextual menu shows up when relaunching SU