I am finding that when I attempt to use 'Delete' or 'Upload Preview Image' from the Manage Gallery section I consistently have a blank transparent overlay shown and nothing further happens.
I really like the look of your plugin and would like to use it but without particularly the delete feature operational it is impractical for me to use it.
I am using version 1.6 with a simple gallery of two videos. My server does not have FFMPEG installed on it, if that is relevant. Apologies if this post is innappropriate here. I did search for other posts regarding this issue and found a number of posts in the plugin & hacks category from people asking for help but none carrying any solutions or answers, so figured maybe the support area was the right place to raise this.
Looking forward to hearing any help available.