Dear friend,
Thank you for letting us know this problem. Sincerely sorry for the inconvenience caused to you! No worry, I'm here to help you.
I have contacted the factory about your problem, and they said that you may need to update the software of the item.
The factory offered us two links.
The first link will show you how to update the software:
http://uploadingit.com/file/g8jsvs4g5wv0fbvf/how%20to%20update.docx
The second link is the file which you can use to update the software:
http://uploadingit.com/file/5hgaq5lmzqtoqgkv/mp4%E5%9B%BA%E4%BB%B6%E5%8D%87%E7%BA%A7.zip
In this case, could you please kindly try it again?
Thanks for your understanding!
Coco:)