Originally Posted by
Liaantje Ever since I bought an iPhone 6 all the movies I made and sent to my mom by whatsapp, show black thumbnails on her phone. All my orevious sent movies (by my iPhone 4) show the first fragment as thumbnail. All movies she got sent from other people show the first fragment as thumbnail. What causes this?
I do not know. Having said that, it may be better to upload your movies to a cloud service like Dropbox or Microsoft's OneDrive and then share the link to the movies. By doing so, she should be able to view your movies intact.