When choosing a "full version" free download, ensure the software includes these essential features: YouTube·Jennifer Mariehttps://www.youtube.com
HandBrake is widely considered one of the best free video transcoders. It is completely free and works on Windows, Mac, and Linux. It supports nearly any video format and provides specialized presets for different devices.
FFmpeg is the powerhouse that runs many other converters. It is a command-line tool that offers the highest level of control and speed, especially when you want to "remux" (change the container from MKV to AVI without re-encoding), which results in zero quality loss.