A future version of WhatsApp will give more control over the amount of compression it applies to sent images and videos. WABetaInfo reports that the two features are currently in development for the Android app, and should eventually present three quality options when sending images and video. The options are “Auto,” “Best quality,” or “Data saver.”
If it releases in this form, it could let you force media to be more compressed if you’re worried about internet speeds or data caps, or lower the amount of compression to ensure images or video are sent in their highest possible quality. Currently, avoiding WhatsApp’s compression involves changing a file’s extension to send it as a document rather than an image or video (The Next Web has a guide on how to do so here).