when you render an image or animation as a avi or quick time . you need change it in format , there he ask you what kind format do you want save your image. jpg or avi. if the avi can play with quick time . use the most powerfull program and free that can play any kind of movie or song call VLM media player. download it and play it . enjoy it. if does not . convert your file to different format with this program Vlm media player.


good luck