I know it may be unlikely to see in the future update, but I hope you can think about my suggestion
Able to add the filename to the video thumbnail picture according to the filename of the thumbnail pictures, but NOT the filenames of the video it generates from. Now, the filename shown on the thumbnail is the filename of the video file. I don't use these filenames as the filename of my video thumbnail, for example, if the name of my video is ABC001___helloworld_in_california.avi ,the name shown on the thumbnail picture could be ABC001.avi, or simply ABC001. Instead of the full name.