You should probably read the manual of Samsung champ c3303 mobile phone and make sure which videos are supported in your mobile. It might be possible that you are trying to run some video file which is not at all supported by your mobile and that is why you are getting those messages. Also make sure that speed of the Internet provided in your mobile is good enough to allow smooth streaming of videos in your mobile. For more related issues regarding the Internet connection in mobile, i would recommend you to contact your service provider and confirm Internet connection in your device.