在所有浏览器和设备上播放视频

I have been searching on video formats and their compatibility war across browsers. I am working on social networking website where user can upload videos . I can't restrict users to upload video of any specific format as its a social networking site. I converted video of any format to .flv and used video.js plugin to play across all browsers but i found that apple doesn't support flash and and android devices are also not playing .flv video. I searched again i found a solution to play webm file it can run on android devices but unfortunately apple osx doesn't support webm also. I have been searching on video formats and thei