How to convert MP4 to AVI for Free
Step 1. Add your MP4 files
Install and run Freemake software. Add your MP4 videos into the software using the "+Video" button.
Step 2. Choose "to AVI"
Click the "to AVI" button on the formats panel. Use one of the ready presets (better “Same as source”) or create your own one.
Step 3. Convert MP4 to AVI
Click the "Convert" button to start the process.
With Freemake software you can also convert YouTube MP4 videos to MP3.