Stellar Converter for Audio Video is a desktop YouTube video converter software. It can speedily convert multiple YouTube to MP4 file format in one go. The software also allows you to customize the output MP4 file. You can set video frame rate, resolution, metadata, and bitrate, etc. There’s no video file size limit for conversion. Further, the software has multiple useful features. Stellar Converter for Audio Video can convert videos to different video and audio format. You can replace audio track in a YouTube video, merge two or more videos, edit videos , and do more. How to convert YouTube to mp3 First, download the desired YouTube video on your computer. Choose any YouTube downloader app, such as Free YouTube Downloader, YTD Video Downloader, Y2Mate, SaveFrom.net, etc. Once the video is downloaded, launch Stellar Converter for Audio Video on your PC or Mac. Add the YouTube video download file saved on your computer. Select MP4 as output format and click on Convert. Also Download facebook video with facebook video downloader