Greetings Silvia - Great plugin. However I'm having an issue with the plugin on a multi-site / domain mapped install of WordPress. I have the plugin running fine on a standard WP install but when I installed it to my other WP install (which has multiple sites running on it and domain mapping), I'm having the following issue:
I click "Update Videos from Channels" from the "External Video Settings" pane and the page goes to the 404 / Not Found page of my site even though the URL in the browser remains pointed at: ".../options-general.php?page=external-videos/external-videos.php"
I am curious whether this has anything to do with the domain or multi-site install of WordPress as the plugin works great on my standard install. Thoughts? It might be something minor I'm missing.