Using Elements 9 (Mac, OS X Snow Leopard). When I choose "Online" from the Share tab, nothing at all happens: no list of options such as Youtube appears. In Preferences>Web sharing, a "Check for Services" returns the error message "Failed to obtain list of services."
It could well be that the interface with those sites is no longer valid. Version 9 is, after all, nearly 4 years old.
The best plan is probably to output your video and manually upload to the site.
Here are instructions for getting the best possible quality video for uploading to a social media site.
Thank you — very helpful.