Couple of ways and suggestions for contacting YouTube support when some issue occurs
I noticed that recently YouTube developers make plenty of changes in the site interface and due to the account and privacy changes that are happening for all Google products. As you probably know most of Google services are merging in users' accounts so they can access these services with a single sign in and use the same credentials for the different services like YouTube, Google+, AdWords, AdSense, Blogger etc.
Which are the ways to contact YouTube
Well there are not many ways to contact YouTube support after the recent updates of the YouTube Help Center. I remember that once there was a contact form which was available for most users but yesterday I spent plenty of time searching for this form and I couldn't find it. Probably YouTube got enormous volume of cases created with this form and their support centers weren't able to handle them and that is why it is temporary (or permanently) removed. Actually YouTube added many new Help Center articles to their database so almost every issue would be covered by the information provided in these articles.
Basically Google wants to educate its users to search and find help on their own instead of directly contacting the support teams.
YouTube also added the 'Send feedback' option in Help preferences section but that is more of a one way communication rather that a form of dialog.
There is also a Contact us section where you can find the address and phone number of the YouTube headquarters:
901 Cherry Ave.
San Bruno, CA 94066 USA
Phone number: +1 650-253-0000
Fax: +1 650-253-0001
Of course different Google business and premium customers like these registered with Google Apps for Business have the opportunity to use direct 24/7 email and phone support.
There are also few other ways for the regular YouTube user to contact support representatives but we will discus them some other time. What I would offer you is to take a look at one of the very interesting points of view about the latest Google search updates.