Vimeo has the best quality (HD) and Youtube has crap quality (320x240x15fps). If you have no idea what Im talking about, heres the short summery; Youtube is crap but has lots of viewers ready to watch you vids, Vimeo has superb qaulity but I don't know anyone who regularly visets Vimeo. If your using one of these serveces (which are both free) for NS, I'd go with Vimeo. Hope this helps!
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