The latest update to the WhatsApp Beta app for Windows Phone adds a new camera icon to the bottom Settings bar in the chat window. It allows for sharing of images and videos with anyone on your contact list.
The new version number for the beta app (via NPU) is 2.16.208. This new camera icon will now allow WhatsApp beta users to quickly share media with more than one contact at once, rather than just going to each contact one by one.
As with the earlier WhatsApp Beta update, which added chat backups to OneDrive, we expect this new feature to be added to the regular WhatsApp Windows Phone app sometime in the near future.