I just started using YouTube. I will have to say that is nice to have a place to upload my videos from my digital camera. There are tons of free photo sharing places, but few video sharing places.
I am told YouTube is one of the best.
My experience today was that YouTube was a little buggy. I would get random errors, and at times it would think I was logged out. I would refresh the page, and usually I was logged right back in.
I am sure the interface will improve overtime.
Until then, be patient, and Happy Video Uploading!