Upload each of the video files to your computer and mark each file so you can keep them in order. Open your editing program (I assume MEP 14, 15, 16?) and input your first file. Then open each file in order. When the program asks if you want to close the previous movie or attach it on the end of the previous one choose "attach". Once you have all your "pieces" loaded you can edit with transitions or whatever you want, and save as one full video.