Nepal plane crash : Not the moral but the Idea that need to learn from the Yeti flight accident

Research by william bond @ As the video of a passenger who was doing live streaming of the flight inside even after the flight accident in the fire the FB live streaming is on to show insight clear video of what’s going on with visual video till the mobile phone burn but the video is safe in the streaming FB cloud
However the aircraft cockpit don’t have this technology , they still rely on old system of black box and cockpit voice recording( no visual ) . Why not have the technology of live streaming cockpit. Why still go and find the block box after the accident in some case not able to find the black box , we could have find Malaysian airline 370 if we had live streaming of cockpit technology .