theThe video bitrate specified is very low: 200kpbs. tryTry this command
ffmpeg -i input_video -b 800 -s 640x360 -vcodec xvid -acodec copy output_video
ffmpeg -i input_video -b 800 -s 640x360 -vcodec xvid -acodec copy output_video As suggested in comments if the device supports h.264h.264 it would be a better choice.