The user either uploads a video or embeds a video with the node. A custom form validation makes sure that either a video is uploaded or embedded. I have a template override for the video content tpl.php to hide an empty field on the node display page.
I'm using views to show various video previews. Both fields are added to the view and it shows up fine to the user. However, I'm getting a lot of "Unable to find the video thumbnail for ..." in the log. Those are errors when I have a youtube video embedded and nothing uploaded.
To come to the point: How can I suppress the video thumbnail from showing in the view when no video is provided. The "Hide if empty" no results setting isn't doing the trick here.