Where can I post large video/audio files with restricted access, for low to no cost.?

Answer 1

You can register a free account with:
http://multiply.com/

I have always enjoy multiply.

What is Multiply?

Multiply is a fun and easy way to keep in touch with your friends and family by sharing things like photo albums, videos, music, blogs, events and more.


What makes Multiply special?

What makes Multiply special is this simple concept: by bringing together everyone you know, in one place, you can share and discuss things like pictures, announcements and events with each other, with almost no effort.

It works when you invite your friends and family to sign up, and encourage them to invite their friends and family. Eventually you'll be connected with everyone in your social circle (your "network").

When you have a new photo album, video, event or anything else to share, just post it on your personal web site. We use your network to notify your immediate contacts, and their contacts, and beyond - as far into the outer-reaches of your social circle as you'd like word to travel. It gets people from all corners of your life involved in fun and lively discussions about each other's posts. You won't get that kind of interaction by sharing your stuff over e-mail or any other way.

Answer 2

http://www.megaupload.com