i don't know whether its a Win Mobile limitation or WhatsApp, but i cant share videos from the internal storage, using the in-app "attach media" only shows some videos not all videos on my device. it would be a nice addition if we were allowed to browse to the files we want. plus, WhatsApp lacks true multitasking, if u are uploading a huge video and u lose focus of the whatsapp window or minimize, or even open another app, the video stops uploading and doesn't resume and starts from scratch, which can be very frustrating.