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Adobe premiere HELP!?

Ok i have made a video using ADOBE premiere pro When i go to export it to upload it to youtube its really small and its makes it into an incredibally large file(674mb) As you can see in the picture black frame around video. I really dont know how to change this and would be gratefull if someone could help me. You can add me on msn or email me at camimhollish@hotmail.com or skype me my skype is CamB00 many thanks and i hope there is somone ot there who can help me.

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