Good Video Editor For Youtube?

Me and my friend make videos on youtube about beauty, and I really need a good video editor. But not just any video editor, i need something WITHOUT a watermark in the middle of the video, something i can crop, voice over, add effects, add background music, and keep the HD on the video. I use a nikon d3100 camera, something with good resolution, but one of the previous editors did not keep the HD and no one wants to watch a blurry bad quality video. So something that KEEPS the HD resolution.

Thanks btw if you want to check out the channel its called youngbeauty1111

I use to use Corel Videostudio Pro X3 (I think X5 is the current version) it is fairly cheap, easy to use, and there's a free 30 day trial with no restrictions if you want to check that out. Just do a google search for it.

~Luke

Check out my channel if you want, I do clean comedy/music videos/raps. 269 subscribers since May.

Link to my channel: http://www.youtube.com/...ture=watch

Btw if you want a free intro I'm making those to. This video has an example and instructions (if you care):