I am using the media_gallery module to upload content.
I can set the display options for the uploaded files under admin/structure/file-types/manage/video/file-display

But for uploaded video, mp4, I am getting a big icon and not a thumbmail.

Under 'Video' I can select the height and width.

But it does not give me an option to set a default player for video for example. I might choose mediafront.