Read the Terms of Service at College Confidential - FAQ: College Discussion - TOS & FAQ
It contains the following:
"Links to Forums, Blogs, Social Network Pages, Photos, Videos, and Personal Sites. Please do not post links to other discussion forums, blogs, personal sites, or other non-authoritative sources. This includes Facebook, Myspace, and similar sites. In order to fulfill our mission of being the best college discussion forum, we want important topics to be discussed here at College Confidential. Linking to discussions elsewhere defeats this purpose. Links to non-authoritative sites like blogs, personal sites, etc., can't be researched for validity on an individual basis and hence are not allowed. All such links will be removed. Similarly, please do not post email addresses or solicit private messages or email communications from other members. While occasionally you may choose to contact an individual member via email or private message when the member accepts such messages, solicitation of such contacts in the forums is not permitted. Links to photos, videos,wallpapers, etc. cannot be verified as appropriate and should not be posted."
So you should not post links to videos here. They tend to get reported to the moderators and erased fairly quickly anyway. What you can do is initiate contact via PM with people who you think may be willing to help based on what they have posted in the past and share links to your videos privately. I would suggest that you be very cautious about sharing your videos with people that you do not know.
A much better idea would be to consult live with someone like a professional musician or music teacher who is qualified to make such an evaluation. You can check out their credentials ahead of time so that you have some assurance that they are indeed so qualified, and that they are not some sort of Internet stalker out to take advantage of you in some way. It is also much easier for them to make that kind of evaluation in a live environment where they can see and hear directly what it is that you are doing, and interact with you while you are singing and playing. You should expect to pay a fee for this service, but you can have a lot more faith in the advice that you get than you would in opinions from random people who may or may not know what they are talking about.