To understand the appeal, we must first understand the container. AVI is a container format , meaning it holds both the video and audio tracks in a single file. Unlike modern formats, AVI is relatively simple and non-restrictive. It doesn't require the advanced codec management that newer standards like MP4 do.
In its prime, AVI was the go-to for —compression technologies that could shrink a full DVD (over 4 GB) down to a 700 MB CD-ROM file without completely destroying visual quality. avi hd movies