Digital Juice has an option to render the video and alpha channel as two
separate clips. The alpha clip is essentially a monochrome clip. How are
these two clips combined in Premiere as though it was one clip with an alpha
Motivation: Most DJ users render with QuickTime Animation with Alpha
Channel. However, the file size is quite large, about one gigabyte per
minute. I would like to try using a codec that has good compression but
does not support an alpha channel. Hence my question.