Hi, to convert LG video to AVI or MP4 or any other format, you need a video editing tool. If you are a beginner, I share Joyoshare Media Cutter. This is a combination of video converter, cutter, merger and editor available to both Windows and Mac. Importantly, it supports almost all video formats and portable devices including various smart TVs. For the conversion, it gives 2 modes. With the high-speed mode, you can convert videos without quality loss. It is easy-to-use and cost-effective, and gives 5-time free use without limits.