Tinytube.net won't work becuase the Curve lacks the ability to play video stramed to it. I have heard some Pearls will work becuase they are running software ver 4.3 I think. This software update hasn't came out for the Curve yet.
enter http:// www.Blueapple.mobi in your bberry web browser. Its blackberries version of youtube. Works great. I personally own a bberry curve, and this is the only site ive used for video. I always recommend this site to new customers i sell curves to.