#1
i have a video of a solo that i'd like to slow down, but i'd like to keep the pitch
can this be done in iMovie?
#3
this is a very complex action. I think you could slow down the video with different video programs, but to keep the pitch of the audio you should get melodyne, best quality for that.

edit: after that, you have to get it in sync again
(╯°□°)╯︵ ┻━┻
#5
Mac? Quicktime.
A man, a woman, and a bad musician walk into a bar...

Lady GaGa orders a beer.