Whether you need to convert the videos online, or tweak and edit the videos with a certain size, you can learn more about the 3 most efficient MP4 to AMV converters from the article. To convert MP4 to AMV file, you can use the advanced compression algorithm to get a much smaller video. When you want to send some large MP4 videos to your smartphone, such as a large movie, there might not be enough storage space. 3 Efficient Methods to Convert MP4 to AMV on Your Windows and Mac with Ease