Simple (and free/cheap) video editing programs for Mac?

[cosmonaut]

I am probably going to start playing live again soon, and I was wondering which would be the simplest and cheapest way to edit a video, to use as background, from found clips (e.g., captured with Jing from movies, youtube videos, etc). 
I plan to use a lot of looping/repetition; the ability to create the structure (e.g., number of times each of the individual clips is repeated) via simple mathematical formulas would be a plus.

[ironfistofthesun]

I use iMovie for things like that...Very basic, but for simple things works well.

[l.b.]

imovie is good if you don't want to pirate anything. honestly though if you can get a copy of Final Cut Pro 7 (not FCP X) it's really easy to use and can do anything you could think of.

[cosmonaut]

I played around with iMovie, and, while functional, it is too confusing for my taste. The fact that clips are moved around if you add/remove something, in particular, is annoying. I am experimenting with VideoPad, http://videopad-video-editor.en.softonic.com/, that is free and allows one to place clips on a timeline and use multiple layers. Terrible memory management, I guess, so it plants often, and it lacks many features one might want. But closer to a pro video editing suite.

[ost-jurgur]

maybe adobe premiere 13 it cost 100 euros perhaps i don'  advice a second hand(i have sell it) cause the transfert of licence is a little bit fastidious

[tiny_tove]

I use final cut pro x and premiere.
you easily find them cracked

[Cementimental]

Just use a pirated copy of Adobe Premiere.

[ost-jurgur]

pirated ;)