I'm using a mac now. The YouTube converter on my mac is Cisdem Video Converter for Mac.
You can find the video on YouTube, add its URL to this app, then start the download.
Try this one converter https://benstoolset.com/video-converter
As you know, the Video Converters directory contains software programs developed to encode, or convert, digital video files from one format to another. Generally speaking, there is none video converter now with the ability to convert video to and from MOV to MP4, M4V to MP4, MOV to MP3, MPEG to MP4, MOV to MPEG, FLV to MP3.