Youtube won't support my MVI videos from GX1
I have a Canon GX1 and the videos appear in iphoto in MVI format. I thought they were going to be AVI. I would like to upload videos to Youtube and the MVI format is not supported. I am a beginner photographer and I am perplexed as to why my videos are appearing in a supposedly archaic format. My camera is less than two years old. I'd like to share my videos with family on youtube. Can anyone help me?