Is it possible to install iMovie 9 on El Capitan? Is it possible to copy iMovie 9 from my OS X Yosemite MacBook and install it in a new MacBook I am yet to buy and will have OS X El Capitan and iMovie 10?

iMovie 10 has very limited export options compared to iMovie 9. So I would like to copy iMovie 9 from my old computer to my new computer. If this is not possible, is there any other way to install iMovie 9 on El Capitan that already has iMovie 10 installed?
Yes. iMovie.app copied from older computer to newer computer with El Capitan works.

(Apple store employee said it would not. Confirmed that it is wrong)