Creating Video Overlays with Alpha Channel
I had a tough time figuring out how to get a video with alpha channel into a Light Stream setup. After a lot of information hunting, I have found a way to do it. Here is a tutorial of the steps that I have found that work to get a video file with an alpha channel into Light Stream, from start to finish.
WebM plug-in link: http://www.fnordware.com/WebM/
For about the first half, I cover alpha channels, video file types that use alpha channels, and my personal workflow with the Adobe Creative Suite for simple video creations with alpha channels.
13:16 - Start of installing WebM plug-in and exporting the file
16:40 - Put the .webm video into your Light Stream setup