AVI is usually a video file format formulated by Microsoft, consequently it can be properly supported by all Windows PCs. It could incorporate both audio and video data in a file container that permits synchronous audio-with-video playback.
AVI file format is very popular. Some camcorders can create .avi videos and a few movies you downloaded from online are .avi files. These movies is usually nicely played and perhaps edited on Windows PCs. But things turn out to be completely different when AVI videos are put into Mac pcs. You might come across with problems whereas watching or editing AVI files in your Mac computer or simply transferring them for your Iphone or ipad through iTunes.
But this doesn't indicate that AVI files are useless on a Mac pc or inaccessible to IOS gadgets. In such condition, you may convert AVI to MOV or some other Mac supported video clip formats such as M4V for playing or editing.