More details needed, please. Do you mean you have four separate iMovie projects and you want them merged into one? And/or what do you mean by "stacked on top of each other"?
Share the three smallest movies to Full Quality QuickTime (in iMovie: Share > QuickTime and choose 'Compress for Full Quality'. Then drag those three QT files onto the timeline of the fourth in iMovie.
So I got all the videos onto one iMovie project, but I want the four videos to be on top of each other, in a column, all playing at the same time. Is this possible?
You can't do this in iMovie unfortunately. You need a multi-track video editor like Final cut to do that. You're referring to picture-in-picture by the way.
You can't do this in iMovie unfortunately. You need a multi-track video editor like Final cut to do that. You're referring to picture-in-picture by the way.
With the plugins they offer you can do some pretty spectacular stuff with iMovie. For that matter, I have done some commercial video work in iMovie using GeeThree plugins because it was easier to do the post in iMovie...