Funny how you're from the UK and it's hard understanding you. If I understood your question, you want to capture a video on a mobile phone, correct?
Most 3G mobile phones have a camera incorporated for pics and video, so just capture a video with it and then transfer it to your PC through the cable and the software the mobile phone comes with. Then, whatever the native file the camera of the phone saved it with, just convert it to a regular video extension live .avi or .flv, or try to upload it as is, since Youtube will have the file the be displayed as a .flv. All videos are .flv on youtube.