Just FYI, "AVI" is a container, it is not a compression codec. Saying your video is in AVI format is like someone asking you what type of fruit you are carrying and then answering that you have a bag of them.
AVI is an older container (like .ts, .mkv, .mov, etc.) and it can accommodate many different types of compression codecs, from uncompressed video to losslessly compressed, to the older h263 (dvix/xvid, etc.) as well as H264 (AVC) I believe.
Saying that video is in AVI format doesn't really tell much about it.