WhatsApp has started rolling out the View Once feature on WhatsApp Web, WhatsApp for Windows, and WhatsApp for macOS. The new feature will be available with the latest versions of these apps, as confirmed by WABetaInfo. In case you haven't received it yet, it should be available over the coming weeks since it has just started rolling out.
This feature was available for WhatsApp's desktop clients but it was removed a year ago reportedly for privacy reasons. But it is now bringing the feature back again.
While this may seem safe and private, the recipient can still take a screenshot of the photo or screen recording of the video. View Once photos and videos are also indicated in the chat even after they've been opened.