Step 1. Free Download M4V to AVI converter through the download adress above "Free Download Now" button stands for. Then install it to your Windows computer prepared to convert M4V to AVI for Windows.

Step 2. Now let's to add W4V files. Do you still remember where those W4V videos locates? You should to remember, for you have to add those W4V files to this M4V to AVI converter program in advance. But choose which way to add files, click "Add Files" icon, or drag and drop directly? Absolutly depends on yourself.
Step 3. Next we should select AVI as output format. The Output Format option may not so eminently, it's behind the video thumbnail and a gear icon next to it, each video thumbnail has one.

Tips: For more settings, please click the gear icon, then you can set video & audio parameters.
Step 4. Finally, let's click "Start" to end our M4V to AVI conversion steps which need to operate with your own hand. Then all will be going on atomatically for converting M4V to AVI.
hereto, the guide of how to convert M4V files to AVI is over. Can't wait to have a try? Then come on!

Related link: How to Convert M4V to MP4, How to Convert F4V to MP4