When video is converted, we choose the middle time of video duration as the thumbnail screen. Sometimes it may not your favor screen, for example it was a blank screen, or the speaker was just look at another side. Therefore, we created a little tool for you to capture your own video thumbnail. You can even upload another image as the video thumbnail.
To use this feature, go here
, click the edit icon on the right-top corner of video thumbnail.
Please change the video thumbnail before the presentation is created and launched to public, because users' browsers may cached old thumbnail.
VCASMO, Chief Developer