I'm wanting to be able to record 2 videos to play at the same time; e.g., solo with accompaniment. My teacher recommended Mixound; however, she has an iPhone and I have an android. I downloaded Video Collage Maker, and recorded/attached one video, but neither my teacher nor I can figure out how to record/attach the second video.

Can someone who uses Video Collage Maker advise as to that second video, or is there a more user friendly android app you would recommend?