Hi, thanks for reaching out. It is not a export. Say I make a complex video with a lot of effects and I want to use it sever times in my timeline but my computer is struggeling with so many tracks. I do not want to wait for the render everytime so I do a video mixdown of just the complexed video part. As I said I come from the Avid world and there I just put an in and out marker and marked the tracks and I could get my mixdown to my bin. Here in Premiere I have to do an export of the in and out marker of the timeline and then import it back in. That is OK, but it takes a little long time to do.