It's very safe, one of the safest sites.
Also to enter videos, when you sign up, it's straight forward. There will be an upload button near the top right of your account. =)
If you guys are worried about safe sites, I use this program called Mcafee Site Advisor to tell me which sites are safe.
www.siteadvisor.com It's a plug in for Internet Explorer and one for Firefox. It always helps me. =D
The plugin to your browser is color coded to tell you how safe the site is.
Red = Unsafe
yellow = Semi-safe/semi-unsafe
Green = safe
Mcafee secure safe = very safe (which involves Youtube)
Gray = Unknown (mostly because it's a new site so that part is part of your own judgement)