VLC Media Player, which plays back AVI files, is freely available at www.videolan.org. The VLC Media Player also plays many other popular media file formats. AVI files are typically used to store movies and other video content in a digital format.
Windows Media Player, which is pre-installed on many Windows computers, also plays AVI files.
Open Freely, an open source software application, also opens and plays hundreds of types of audio, video and graphic file formats. Many cloud-based storage services, such as Google Drive and Dropbox, allow AVI files and other media content to be streamed directly from their sites.