If I stream on YouTube, does the icon that shows me live appear on my profile ?

nope. off-topic: don't stream on youtube - if possible don't do anything on youtube. google just makes it worse each time they change something.

I will try, but I don't promise.

Just use Twtich, you'll save yourself a million frustrations. Also, its easier to establish yourself/grab an audience on Twitch.

not streaming to MySpace plebs everywhere