Hey all. I’ve basically figured out what it is. I’m yet to update my fork on Github, but it’s a one-liner anyway.
Open up wistia-wordpress-oembed-plugin.php (in a text-editor or via the admin) and change the wp_oembed_add_provider call to:
wp_oembed_add_provider( '/https?:\/\/(.+)?(wistia\.(com|net)|wi\.st)\/.*/', 'http://fast.wistia.net/oembed', true );
It’s a change in the add provider function that means it won’t detect the RegEx unless you tell it to look for one (3rd parameter)
