Video from WhatsApp won't play on my Asus phone.

Up until Thursday (three days ago) I was viewing videos on whatsapp. Then all of a sudden not only can't I see new video content , but past videos I used to watch as well. What happened, and how can I rectify this?

I have already cleared cache and uninstalled and reinstalled the whatsapp. I still have the same stationary picture with an arrow as if to make it start - but it does not. Moving the bar along the bottom does not activate or change the cover frame.