Cannot get any videos to show under "save selection"

I've tried pretty much everything I can think of.:

I'm using Mavericks.

I have tried safari, chrome and firefox.

I have tried switching to another theme before installing and configuring the plugin.

I have tried checking"This is a Google+ connected channel"

My channel is public - UCL710ehRsQ0M-uJ5F1vez-A

I have uninstalled the widget and reinstalled it to no avail.

Any ideas what could be wrong?