Adobe Premier Help

Hi :) I need some quick help to figure out how to use a couple of things in Adobe Premier. Work would be done through screen sharing. I basically need to remove the boxes shown in the attached screenshot and convert the black background to be transparent. Then I'd render that clip as MP4 and continue editing (by myself without your help) on Camtasia. Good command of spoken English is a must. Add the "sky is blue" at the beginning of your proposal to make sure you read the post. Thanks, Fawzy,B.