I installed the AllVideos extension using the "install from web" tab and enabled the Plugin using "Plugin Manager: Plugins". I am using the JCE Editor. I do not see the "Simple Image Gallery PRO" editor plugin button located under my JCE editor.
What do I need to do to get this plugin to work to add embed videos and slideshows to my site pages?

The AllVideos plugin doesn't have an editor button. If you are experiencing issues with the SIG Pro editor button, though you can open a ticket in the JoomlaWorks Ticket Support System, here: www.joomlaworks.net/dashboard.