LinkedIn: If your company or firm name has changed and you want to update this in your LinkedIn profile, you can update all of the “About” text and references within the profile. However, to change your company’s page name, you must send a separate request to the LinkedIn Company Page Team. Be patient, it can take up to a week for LinkedIn to implement. Here is the link to request a company name change: http://help.linkedin.com/app/answers/detail/a_id/15818
YouTube: Again, you can update your logo and company name in the “About” text, but your actual username cannot be changed. You must set up a completely new account and transfer all videos and additional content on your current page to the new company page.
– By Berbay Senior Account Manager Beth Miller