Although, I’m trying to use this plugin to display multiple thumbnails (1 thumbnail for a Youtube video, and 1 thumbnail for a Vimeo video). Both of them are contained in custom fields (video_youtube and video_vimeo respectively). Is that possible?
Right now, that it’s only possible to enter 1 custom field name in the Video Thumbnails settings page
So each post has two videos? The plugin currently focuses on using the_post_thumbnail() template tag provided by WordPress which only allows one thumbnail per post, so you’d need to get your hands dirty with some changes to the plugin code to save multiple thumbnails per post.