Loving YTtalk
okay so I recorded a video today and for some reason there are black bars on the side.

All my other videos on my YouTube don't have this, and I've never had this problem before.

I know people find black bars ugly on a video, so should I still upload it?
I've moved this to the Video Editing/recording/software forum. ^^

Your editing program most likely exported using an aspect ration of 4:3, which makes it almost like a little square image (with black bars on either side). You want to change it to have an aspect ratio of 16:9 to have the image fill up the entire YouTube video player. ^^ @chottom posted a good link that will help! =)
Was this during the recording process or after editing? More information would be helpful in solving your issue.