zoneminder/web/skins/classic/css/base/views/video.css

#contentTable + input {
    margin-top: 6px;
}

#videoProgress {
    margin: 8px auto 4px;
}

#videoFilesHeader {
    margin: 8px auto 4px;
}

#videoNoFiles {
    margin: 4px auto;
}

#videoFile {
    margin-bottom: 6px;
}