youtube comment question

Okay, I have a new Youtube account but I've only been able too comment two peoples' videos... I'm not totally sure what's up....

So you know when uploading videos onto youtube. Is there like a privacy setting Where not everyone around the world can view ...

I want to post myself singing on youtube, but I'm a little confused on how to do it. If I wanted to use like a mic for the pc...

How do you delete your youtube account?

Are there any youtube like sites? If so, What are the urls? Thanks.

How do you upload songs on youtube?

Can I get videos on my zune off youtube?? how?? also can I get movies on it?

When people have their myspace comments hidden how can you read them?

Does anyone actually check there comments while online?

Can you change your username on youtube?? How?