I really, really don't want to sound like a dick... so I'm just going to give you some advice, make of it what you will.
Theres no point in promoting a new band when you havent even got something band worthy (you said not all the band was there) to showcase.
Like you have just proved yourself:
I know it doesn't sound like anything yet. but it's a start though.
We're working on it.
It sounds as though you're trying to sugarcoat your band in way that makes people believe you are actually better than that. If thats the case... hold on a few weeks before you post a clip up. First impressions count, especially on the internet... people remember names of bands and if they see a link to a 'new' clip of a band they thought was shit a while back its highly unlikely that they are going to waste their internet connection waiting for another shoddy video clip to buffer. Regardless on how much the band has improved.
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But due to camera quality the sound is to blurry, guitar was to low.
That suggests to people that you recognise video problems but lack the dedication to make it sound good to the people who count. Potential fans.
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Don't think this is it, we're going to change it alot.
Then what was the point in showcasing already dated material?
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At the end of the day, when you post stuff up make sure its a good representation of the band. Words and excuses can't polish turds. People see through shit... especially kids.
Hope you didn't take offence to any of that.