Hi there. I'm an experienced video editor and motion graphics designer. The software i use consists only of Adobe products, and that includes Premiere, After Effects, Audition, Illustrator and Photoshop. I've done Chroma Keying before, and have experience in using different plugins/software for it. Currently i use one of the best plugins available for this called Primatte Keyer. The time needed to finish the job depends on the duration of the video. Feel free to contact me for more info and details. :)